/* ==========================================
   CLIENTSONIX THEME - CSS VARIABLES
   ========================================== */

:root {
    /* PRIMARY COLORS - Navy Blue Theme */
    --color-primary: #001F3F;
    --color-primary-dark: #002855;
    --color-primary-light: #003366;
    --color-accent: #00509E;

    /* SECONDARY COLORS - Blue Spectrum */
    --color-blue-50: #F0F9FF;
    --color-blue-100: #E0F2FE;
    --color-blue-200: #BAE6FD;
    --color-blue-500: #3B82F6;
    --color-blue-600: #2563EB;

    /* NEUTRAL COLORS */
    --color-white: #FFFFFF;
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-600: #4B5563;
    --color-gray-900: #111827;

    /* SEMANTIC COLORS */
    --color-success: #10B981;
    --color-error: #EF4444;
    --color-warning: #F59E0B;
    --color-info: #3B82F6;

    /* TYPOGRAPHY */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-normal: 400;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* SPACING */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* BORDER RADIUS */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.25rem;
    --radius-2xl: 2rem;

    /* SHADOWS */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 31, 63, 0.15);

    /* TRANSITIONS */
    --transition-fast: 200ms ease-in-out;
    --transition-base: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
}

/* Dark Theme */
body.dark-mode {
    --color-primary: #60A5FA;
    --color-primary-light: #93C5FD;
    --color-accent: #3B82F6;
    --color-white: #0F172A;
    --color-gray-50: #111827;
    --color-gray-100: #1F2937;
    --color-gray-200: #374151;
    --color-gray-600: #9CA3AF;
    --color-gray-900: #F3F4F6;
    --color-blue-50: #1E3A5F;
    --color-blue-100: #2C5282;
}

/* ==========================================
   GLOBAL STYLES
   ========================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: var(--color-white);
    transition: background-color var(--transition-base), color var(--transition-base);
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ==========================================
   TYPOGRAPHY
   ========================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent);
}

/* ==========================================
   BUTTONS
   ========================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
    gap: var(--spacing-sm);
}

.btn-primary {
    background: linear-gradient(to right, var(--color-primary), var(--color-primary-light));
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(0, 31, 63, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 31, 63, 0.3);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-secondary {
    background: transparent;
    color: var(--color-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

.btn-secondary:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==========================================
   NAVBAR
   ========================================== */

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--color-white);
    border-bottom: 3px solid var(--color-primary);
    box-shadow: 0 0 0 0 transparent;
    transition: box-shadow var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-lg);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    font-size: 1.25rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: var(--color-white);
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-bold);
}

.nav-logo-image {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-white);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.nav-title {
    display: none;
}

@media (min-width: 768px) {
    .nav-title {
        display: block;
    }
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: var(--color-gray-600);
    font-weight: var(--font-weight-semibold);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus {
    color: var(--color-primary);
}

.nav-link:hover::after,
.nav-link:focus::after {
    width: 100%;
}

.theme-toggle-item {
    margin-left: auto;
}

.dev-trigger-item {
    display: flex;
}

.dev-trigger {
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: var(--radius-lg);
    background: rgba(0, 80, 158, 0.08);
    color: var(--color-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.dev-trigger:hover {
    background: rgba(0, 80, 158, 0.16);
    transform: translateY(-2px);
}

.dev-trigger svg {
    width: 1.25rem;
    height: 1.25rem;
}

.theme-toggle {
    background: var(--color-gray-100);
    border: none;
    border-radius: var(--radius-lg);
    width: 2.5rem;
    height: 2.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--color-primary);
}

.theme-toggle:hover {
    background: var(--color-gray-200);
    transform: scale(1.05);
}

.icon-sun,
.icon-moon {
    width: 1.25rem;
    height: 1.25rem;
    transition: transform var(--transition-base);
}

body.dark-mode .icon-sun {
    display: none;
}

body:not(.dark-mode) .icon-moon {
    display: none;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 0.4rem;
    cursor: pointer;
    margin-left: auto;
}

.hamburger span {
    width: 1.5rem;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(0.5rem, 0.5rem);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(0.35rem, -0.35rem);
}

@media (max-width: 767px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 4rem;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        gap: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-base);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        max-height: 400px;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-link {
        display: block;
        padding: var(--spacing-md) var(--spacing-lg);
        border-bottom: 1px solid var(--color-gray-200);
    }

    .nav-link::after {
        display: none;
    }

    .theme-toggle-item {
        margin-left: 0;
        border-top: 1px solid var(--color-gray-200);
        width: 100%;
        padding: var(--spacing-md) var(--spacing-lg);
    }

    .theme-toggle {
        width: 100%;
        justify-content: flex-start;
    }
}

/* ==========================================
   HERO SECTION
   ========================================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: radial-gradient(circle at 20% 20%, rgba(0, 135, 255, 0.25), transparent 35%),
                radial-gradient(circle at 80% 60%, rgba(0, 60, 130, 0.35), transparent 45%),
                linear-gradient(135deg, #040b1d 0%, #04142d 45%, #0a2f6e 100%);
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 50%, rgba(0, 170, 255, 0.12), transparent 55%);
    pointer-events: none;
    mix-blend-mode: screen;
}

.hero-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    filter: drop-shadow(0 0 12px rgba(64, 182, 255, 0.35));
    background: linear-gradient(180deg, rgba(4, 11, 29, 0.9) 0%, rgba(6, 20, 50, 0.9) 100%);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 50%, rgba(0, 160, 255, 0.15) 0%, transparent 45%),
                radial-gradient(circle at 80% 80%, rgba(0, 50, 130, 0.18) 0%, transparent 50%),
                linear-gradient(180deg, rgba(0, 0, 0, 0.25) 0%, rgba(0, 0, 0, 0.55) 100%);
    pointer-events: none;
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-lg);
    text-align: center;
}

@media (min-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr 1fr;
        text-align: left;
    }
}

.hero-text {
    color: var(--color-white);
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-md);
    background: linear-gradient(to right, var(--color-white), var(--color-blue-200));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-height: 5rem;
}

.typing-cursor-title {
    display: inline-block;
    font-weight: var(--font-weight-normal);
    animation: blink 0.7s infinite;
    margin-left: 2px;
    background: linear-gradient(to right, var(--color-white), var(--color-blue-200));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
    color: var(--color-blue-100);
    min-height: 3rem;
}

.typing-cursor {
    display: inline-block;
    font-weight: var(--font-weight-normal);
    animation: blink 0.7s infinite;
    margin-left: 2px;
}

@keyframes blink {
    0%, 50% {
        opacity: 1;
    }
    51%, 100% {
        opacity: 0;
    }
}

.hero-tagline {
    font-size: 1rem;
    color: var(--color-blue-200);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

@media (min-width: 768px) {
    .hero-buttons {
        flex-direction: row;
    }
}

.hero-image {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeInRight 0.8s ease-out;
}

.profile-placeholder {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    border: 2px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.3);
    font-size: 120px;
    position: relative;
}

.pulse-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 3px solid rgba(186, 230, 253, 0.6);
    animation: pulseWave 3s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    pointer-events: none;
}

.pulse-ring-1 {
    animation-delay: 0s;
}

.pulse-ring-2 {
    animation-delay: 1s;
}

.pulse-ring-3 {
    animation-delay: 2s;
}

@keyframes pulseWave {
    0% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.3);
        opacity: 0.5;
    }
    100% {
        transform: scale(1.6);
        opacity: 0;
    }
}

.profile-placeholder svg {
    width: 150px;
    height: 150px;
    color: rgba(255, 255, 255, 0.5);
}

.profile-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    position: relative;
    z-index: 2;
}

@media (max-width: 767px) {
    .hero-image {
        display: flex;
        margin: 0 auto var(--spacing-xl);
        order: 1;
    }

    .hero-text {
        order: 2;
    }

    .profile-placeholder {
        width: 200px;
        height: 200px;
    }
}

/* ==========================================
   SECTION STYLES
   ========================================== */

section {
    padding: var(--spacing-2xl) 0;
    transition: background-color var(--transition-base);
}

.section-title {
    text-align: center;
    font-size: clamp(2rem, 5vw, 3rem);
    margin-bottom: var(--spacing-2xl);
    color: var(--color-primary);
    position: relative;
    padding-bottom: var(--spacing-lg);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(to right, var(--color-primary), var(--color-accent));
    border-radius: 2px;
}

/* ==========================================
   ABOUT SECTION
   ========================================== */

.about {
    background: linear-gradient(135deg, var(--color-blue-50) 0%, var(--color-white) 100%);
}

.about-content {
    display: grid;
    gap: var(--spacing-2xl);
}

.about-text h3 {
    font-size: 1.5rem;
    margin-top: var(--spacing-lg);
    color: var(--color-primary);
}

.about-text h3:first-child {
    margin-top: 0;
}

.about-text p {
    color: var(--color-gray-600);
    line-height: 1.8;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.stat-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    font-weight: var(--font-weight-semibold);
}

/* ==========================================
   EXPERTISE SECTION
   ========================================== */

.expertise {
    background: var(--color-white);
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
}

.expertise-category {
    background: linear-gradient(135deg, var(--color-blue-50), var(--color-blue-100));
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.expertise-category:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.expertise-heading {
    color: var(--color-primary);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    font-weight: var(--font-weight-bold);
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.skill-name {
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    font-size: 0.95rem;
}

.skill-bar {
    height: 6px;
    background: rgba(0, 31, 63, 0.1);
    border-radius: 3px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(to right, var(--color-primary), var(--color-accent));
    border-radius: 3px;
    animation: progressFill 1.5s ease-out forwards;
}

@keyframes progressFill {
    from { width: 0; }
}

.skill-badge {
    display: inline-block;
    background: linear-gradient(135deg, rgba(0, 31, 63, 0.1), rgba(0, 80, 158, 0.1));
    color: var(--color-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    border: 1px solid rgba(0, 31, 63, 0.2);
    transition: all var(--transition-fast);
}

.skill-badge:hover {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: var(--color-white);
    border-color: transparent;
    transform: scale(1.05);
}

/* ==========================================
   EXPERIENCE SECTION
   ========================================== */

.experience {
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-blue-50) 100%);
}

.timeline {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
    position: relative;
    padding-left: var(--spacing-2xl);
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-lg);
}

.timeline-marker {
    position: absolute;
    left: -10px;
    top: 0;
    width: 22px;
    height: 22px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border: 3px solid var(--color-white);
    border-radius: 50%;
    box-shadow: 0 0 0 3px var(--color-primary);
}

.timeline-content {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.timeline-content:hover {
    box-shadow: var(--shadow-lg);
    transform: translateX(8px);
}

.timeline-content h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.experience-logo-wrapper {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.experience-logo {
    max-width: 180px;
    height: auto;
    max-height: 60px;
    object-fit: contain;
    border-radius: 8px;
    background: white;
    padding: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.experience-org {
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent);
    margin-bottom: var(--spacing-xs);
}

.org-link {
    color: var(--color-accent);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
}

.org-link:hover {
    color: var(--color-primary);
    text-decoration: none;
}

.org-link::after {
    content: '↗';
    margin-left: 5px;
    font-size: 0.9em;
    display: inline-block;
    transition: transform 0.3s ease;
}

.org-link:hover::after {
    transform: translate(3px, -3px);
}

.experience-duration {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-sm);
}

.experience-desc {
    color: var(--color-gray-600);
    line-height: 1.8;
}

/* ==========================================
   EDUCATION SECTION
   ========================================== */

.education {
    background: var(--color-white);
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.education-item {
    background: linear-gradient(135deg, var(--color-blue-50), var(--color-blue-100));
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-gray-200);
    transition: all var(--transition-base);
    display: flex;
    gap: var(--spacing-lg);
}

.education-item.certification {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(16, 185, 129, 0.05));
    border-color: var(--color-success);
}

.education-item:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--color-accent);
}

.education-icon {
    width: 60px;
    height: 60px;
    min-width: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: var(--radius-lg);
    color: var(--color-white);
}

.education-icon svg {
    width: 32px;
    height: 32px;
}

.education-content h3 {
    font-size: 1.1rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.education-school {
    font-size: 0.95rem;
    color: var(--color-gray-600);
    font-weight: var(--font-weight-semibold);
}

.education-year {
    font-size: 0.875rem;
    color: var(--color-accent);
    font-weight: var(--font-weight-bold);
}

/* ==========================================
   SERVICES SECTION
   ========================================== */

.services {
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-blue-50) 100%);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.service-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-8px);
}

.service-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    margin-bottom: var(--spacing-lg);
    transition: transform var(--transition-base);
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
}

.service-icon svg {
    width: 40px;
    height: 40px;
}

.service-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

.service-card p {
    color: var(--color-gray-600);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ==========================================
   CONTACT SECTION
   ========================================== */

.contact {
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-blue-50) 100%);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
}

@media (max-width: 767px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.info-item {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.info-icon {
    width: 50px;
    height: 50px;
    min-width: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: var(--radius-lg);
    color: var(--color-white);
}

.info-icon svg {
    width: 24px;
    height: 24px;
}

.info-content h4 {
    color: var(--color-primary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.info-content p,
.info-content a {
    color: var(--color-gray-600);
    font-size: 1rem;
}

.info-content a:hover {
    color: var(--color-accent);
}

.contact-form {
    background: var(--color-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: all var(--transition-fast);
    color: var(--color-gray-900);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-gray-600);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 80, 158, 0.1);
}

.contact-form .btn {
    width: 100%;
    margin-top: var(--spacing-md);
}

.form-feedback {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: none;
}

.form-feedback.success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    border-left: 4px solid var(--color-success);
}

.form-feedback.error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
    border-left: 4px solid var(--color-error);
}

/* ==========================================
   FOOTER
   ========================================== */

.footer {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.footer-image-container {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.footer-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.footer-text-info {
    text-align: center;
}

.footer-name {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.footer-logo {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    font-weight: var(--font-weight-bold);
}

.footer-tagline {
    color: var(--color-blue-200);
    font-size: 0.95rem;
    margin: 0;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--color-blue-100);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-white);
}

.social-icons {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.social-icon {
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.12);
    color: var(--color-white);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.social-icon svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.social-icon:hover {
    transform: translateY(-3px) scale(1.03);
}

.social-icon.linkedin { background: #0a66c2; }
.social-icon.facebook { background: #1877f2; }
.social-icon.instagram {
    background: radial-gradient(circle at 30% 30%, #fdf497 0%, #fdf497 10%, #fd5949 45%, #d6249f 60%, #285AEB 90%);
}
.social-icon.email { background: #6b7280; }
.social-icon.whatsapp { background: #25d366; }

.social-icon:focus-visible {
    outline: 2px solid var(--color-white);
    outline-offset: 3px;
}

.footer-bottom {
    border-top: 1px solid rgba(0, 80, 158, 0.2);
    padding-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.footer-bottom p {
    margin: 0;
    color: var(--color-blue-200);
    font-size: 0.9rem;
}

.footer-policies {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-policies a {
    color: var(--color-blue-200);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-policies a:hover {
    color: var(--color-white);
}

/* ==========================================
   ANIMATIONS
   ========================================== */

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
}

/* ==========================================
   UTILITIES
   ========================================== */

.hidden {
    display: none;
}

.visible {
    display: block;
}

/* ==========================================
   DEVELOPER MODAL
   ========================================== */

.dev-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    z-index: 2000;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.dev-modal.open {
    opacity: 1;
    pointer-events: auto;
}

.dev-modal-content {
    position: relative;
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    width: min(480px, 100%);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.18);
    animation: fadeInUp 0.5s ease;
    overflow: hidden;
}

.dev-modal-header {
    margin-bottom: var(--spacing-md);
}

.dev-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    background: rgba(0, 80, 158, 0.1);
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
    font-size: 0.9rem;
    margin: 0 0 var(--spacing-sm) 0;
}

.dev-modal-title {
    margin: 0;
    font-size: 1.5rem;
    color: var(--color-primary);
}

.dev-company {
    margin: var(--spacing-xs) 0 0 0;
    color: var(--color-gray-600);
}

.dev-modal-body {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    color: var(--color-gray-700);
}

.dev-modal-text {
    margin: 0;
    line-height: 1.6;
}

.dev-whatsapp-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.9rem 1.1rem;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, #0f9d58, #0aa34f);
    color: var(--color-white);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    overflow: hidden;
    box-shadow: 0 12px 30px rgba(15, 157, 88, 0.35);
}

.dev-phone-wrapper {
    position: relative;
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.dev-phone-icon {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    z-index: 1;
}

.dev-phone-icon svg {
    width: 22px;
    height: 22px;
    color: var(--color-white);
}

.dev-phone-text {
    position: relative;
    z-index: 1;
}

.dev-modal-note {
    margin: 0;
    font-size: 0.95rem;
    color: var(--color-gray-500);
}

.dev-modal-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
    border: none;
    background: rgba(0, 0, 0, 0.04);
    border-radius: 50%;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--color-gray-700);
    transition: background var(--transition-fast);
}

.dev-modal-close:hover {
    background: rgba(0, 0, 0, 0.08);
}

.dev-modal .pulse-ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.6);
    pointer-events: none;
}

.dev-modal .pulse-ring-1 { animation: pulseWave 3s cubic-bezier(0.4, 0, 0.2, 1) infinite; }
.dev-modal .pulse-ring-2 { animation: pulseWave 3s cubic-bezier(0.4, 0, 0.2, 1) infinite 0.6s; }
.dev-modal .pulse-ring-3 { animation: pulseWave 3s cubic-bezier(0.4, 0, 0.2, 1) infinite 1.2s; }

body.no-scroll {
    overflow: hidden;
}

@media (max-width: 480px) {
    .dev-modal-content {
        padding: var(--spacing-lg);
    }

    .dev-whatsapp-btn {
        width: 100%;
        justify-content: center;
    }
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */

@media (max-width: 480px) {
    :root {
        --spacing-lg: 1.5rem;
        --spacing-2xl: 2.5rem;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }

    .btn {
        width: 100%;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ==========================================
   DARK MODE ADJUSTMENTS
   ========================================== */

body.dark-mode {
    background: var(--color-white);
    color: var(--color-gray-900);
}

body.dark-mode .navbar {
    background: var(--color-gray-100);
    border-bottom-color: var(--color-primary);
}

body.dark-mode .nav-link {
    color: var(--color-gray-600);
}

body.dark-mode .nav-link:hover {
    color: var(--color-primary);
}

body.dark-mode .nav-brand {
    color: var(--color-primary);
}

body.dark-mode .nav-logo-image {
    border-color: var(--color-gray-100);
}

body.dark-mode .theme-toggle {
    background: var(--color-gray-200);
    color: var(--color-primary);
}

body.dark-mode .hamburger span {
    background: var(--color-primary);
}

/* Hero Section Dark Mode */
body.dark-mode .hero {
    background: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #0F172A 100%);
}

body.dark-mode .hero-title {
    background: linear-gradient(to right, #F3F4F6, #93C5FD);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

body.dark-mode .hero-subtitle {
    color: var(--color-gray-600);
}

body.dark-mode .hero-tagline {
    color: var(--color-gray-600);
}

/* About Section Dark Mode */
body.dark-mode .about {
    background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-white) 100%);
}

body.dark-mode .about-text h3 {
    color: var(--color-primary);
}

body.dark-mode .about-text p {
    color: var(--color-gray-600);
}

body.dark-mode .stat-card {
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-200);
}

body.dark-mode .stat-number {
    color: var(--color-primary);
}

body.dark-mode .stat-label {
    color: var(--color-gray-600);
}

/* Expertise Section Dark Mode */
body.dark-mode .expertise {
    background: var(--color-white);
}

body.dark-mode .expertise-category {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
    border: 1px solid var(--color-gray-200);
}

body.dark-mode .expertise-heading {
    color: var(--color-primary);
}

body.dark-mode .skill-name {
    color: var(--color-gray-900);
}

body.dark-mode .skill-badge {
    background: var(--color-gray-200);
    color: var(--color-gray-900);
    border-color: var(--color-gray-200);
}

body.dark-mode .skill-badge:hover {
    background: var(--color-primary);
    color: var(--color-white);
}

/* Experience Section Dark Mode */
body.dark-mode .experience {
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-gray-100) 100%);
}

body.dark-mode .timeline-content {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
    border: 1px solid var(--color-gray-200);
}

body.dark-mode .timeline-content h3 {
    color: var(--color-primary);
}

body.dark-mode .experience-org {
    color: var(--color-primary);
}

body.dark-mode .experience-duration {
    color: var(--color-gray-600);
}

body.dark-mode .experience-desc {
    color: var(--color-gray-600);
}

body.dark-mode .org-link {
    color: var(--color-primary);
}

body.dark-mode .org-link:hover {
    color: var(--color-accent);
}

body.dark-mode .experience-logo {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

/* Education Section Dark Mode */
body.dark-mode .education {
    background: var(--color-white);
}

body.dark-mode .education-item {
    background: var(--color-gray-100);
    border-color: var(--color-gray-200);
}

body.dark-mode .education-item.certification {
    background: rgba(16, 185, 129, 0.1);
    border-color: var(--color-success);
}

body.dark-mode .education-content h3 {
    color: var(--color-primary);
}

body.dark-mode .education-school {
    color: var(--color-gray-600);
}

body.dark-mode .education-year {
    color: var(--color-primary);
}

/* Services Section Dark Mode */
body.dark-mode .services {
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-gray-100) 100%);
}

body.dark-mode .service-card {
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-200);
}

body.dark-mode .service-card h3 {
    color: var(--color-primary);
}

body.dark-mode .service-card p {
    color: var(--color-gray-600);
}

/* Contact Section Dark Mode */
body.dark-mode .contact {
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-gray-100) 100%);
}

body.dark-mode .contact-form {
    background: var(--color-gray-100);
    color: var(--color-gray-900);
    border: 1px solid var(--color-gray-200);
}

body.dark-mode .form-group label {
    color: var(--color-primary);
}

body.dark-mode .form-group input,
body.dark-mode .form-group textarea {
    background: var(--color-gray-200);
    border-color: var(--color-gray-200);
    color: var(--color-gray-900);
}

body.dark-mode .form-group input:focus,
body.dark-mode .form-group textarea:focus {
    border-color: var(--color-primary);
    background: var(--color-white);
}

body.dark-mode .info-content h4 {
    color: var(--color-primary);
}

body.dark-mode .info-content p,
body.dark-mode .info-content a {
    color: var(--color-gray-600);
}

body.dark-mode .info-content a:hover {
    color: var(--color-primary);
}

/* Footer Dark Mode */
body.dark-mode .footer {
    background: var(--color-gray-100);
    border-top: 1px solid var(--color-gray-200);
}

body.dark-mode .footer-tagline {
    color: var(--color-gray-600);
}

body.dark-mode .footer-links a {
    color: var(--color-gray-600);
}

body.dark-mode .footer-links a:hover {
    color: var(--color-primary);
}

body.dark-mode .footer-bottom p {
    color: var(--color-gray-600);
}

body.dark-mode .footer-policies a {
    color: var(--color-gray-600);
}

body.dark-mode .footer-policies a:hover {
    color: var(--color-primary);
}

/* Section Titles Dark Mode */
body.dark-mode .section-title {
    color: var(--color-primary);
}

body.dark-mode .section-title::after {
    background: linear-gradient(to right, var(--color-primary), var(--color-primary-light));
}