/* ========================================
   DESIGN SYSTEM - CSS CUSTOM PROPERTIES
   ======================================== */

/* =======================
   THEME VARIABLES
   ======================= */

:root {
    /* Typography */
    --font-family-primary: 'Segoe UI', 'Inter', -apple-system, BlinkMacSystemFont, 'Roboto', Arial, sans-serif;
    --font-family-mono: 'SF Mono', 'Consolas', monospace;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;

    /* Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;

    /* Spacing */
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-6: 1.5rem;
    --space-8: 2rem;

    /* Radius */
    --radius-md: 6px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-full: 9999px;

    /* Z */
    --z-fixed: 1030;

    /* Line Height */
    --leading-relaxed: 1.625;

    /* Letter Spacing */
    --tracking-wide: 0.025em;

    /* Transitions */
    --transition-all: all 0.3s ease;

    /* Gradients */
    --gradient-secondary: linear-gradient(135deg, #ff0055, #ff6b6b);
}

/* =======================
   DARK THEME
   ======================= */

:root[data-theme="dark"] {
    --primary-color: #ffffff;
    --secondary-color: #ffffff;
    --accent-color: #ff0055;

    --text-primary: #ffffff;
    --text-secondary: #e0e0e0;
    --text-muted: #b0b0b0;
    --text-inverse: #000000;
    --text-color: #ffffff;

    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --card-bg: #1a1a1a;

    --border-color: rgba(255,255,255,0.1);
    --border-primary: rgba(255,255,255,0.1);
    --border-focus: rgba(255,255,255,0.3);

    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
    --shadow-xl: 0 12px 32px rgba(0,0,0,0.6);

    --navbar-bg: rgba(10,10,10,0.85);
    --navbar-text: #ffffff;
    --navbar-hover: #ffffff;

    --surface-primary: rgba(26, 26, 26, 0.9);
    --primary-hover: #e0e0e0;
    --success: #22c55e;
}

/* =======================
   LIGHT THEME
   ======================= */

:root[data-theme="light"] {
    --primary-color: #111111;
    --secondary-color: #111111;
    --accent-color: #ff0055;

    --text-primary: #111111;
    --text-secondary: #333333;
    --text-muted: #666666;
    --text-inverse: #ffffff;
    --text-color: #111111;

    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --card-bg: #ffffff;

    --border-color: rgba(0,0,0,0.1);
    --border-primary: rgba(0,0,0,0.1);
    --border-focus: rgba(0,0,0,0.3);

    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
    --shadow-xl: 0 12px 32px rgba(0,0,0,0.25);

    --navbar-bg: rgba(255,255,255,0.9);
    --navbar-text: #111111;
    --navbar-hover: #111111;

    --surface-primary: rgba(255, 255, 255, 0.9);
    --primary-hover: #333333;
    --success: #22c55e;
}

/* ========================================
   RESET
   ======================================== */

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

a {
    text-decoration: none;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-primary);
    background: var(--bg-primary);
    color: var(--text-secondary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========================================
   GLOBAL TRANSITIONS (SAFE)
   ======================================== */

body,
a,
button {
    transition: background-color .25s ease, color .25s ease, border-color .25s ease;
}

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

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: var(--space-4) var(--space-8);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--navbar-bg);
    backdrop-filter: blur(12px);
    z-index: var(--z-fixed);
    border-bottom: 1px solid var(--border-color);
}

.nav-brand {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--navbar-text);
}

/* 🚫 PROFILE IMAGE FULLY REMOVED */
.nav-profile-pic,
.profile-container,
.profile-pic {
    display: none !important;
}

/* Nav Links */
.nav-links {
    list-style: none;
    display: flex;
    gap: var(--space-6);
}

.nav-links a {
    color: var(--navbar-text);
    font-weight: 500;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--navbar-hover);
    transform: translateX(-50%);
    transition: width .3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 70%;
}

/* Mobile Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--navbar-text);
}

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

.hero {
    min-height: 100vh;
    background: url('images/back.gif') center/cover fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    text-align: center;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(rgba(0,0,0,.5), rgba(0,0,0,.35));
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-content h1 {
    font-size: 4rem;
    font-weight: 800;
    color: #fff;
    animation: heroZoom 1.6s ease forwards;
}

.hero-content p {
    font-size: 2rem;
    color: #fff;
    margin-top: 1rem;
}

@keyframes heroZoom {
    from { transform: scale(.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* ========================================
   SECTIONS
   ======================================== */

section {
    padding: 5rem 2rem;
    background: var(--bg-primary);
}

section h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 3rem;
}

/* ========================================
   CARDS
   ======================================== */

.skill-card,
.project-card,
.certification-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: transform .3s ease;
}

.skill-card:hover,
.project-card:hover,
.certification-card:hover {
    transform: translateY(-6px);
}

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

footer {
    text-align: center;
    padding: 1.5rem;
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
}

/* ========================================
   MOBILE
   ======================================== */

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }

    .nav-links {
        position: fixed;
        inset: 70px 0 0 0;
        background: var(--navbar-bg);
        flex-direction: column;
        align-items: center;
        padding-top: 2rem;
        transform: translateX(-100%);
        transition: transform .3s ease;
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .hero-content p {
        font-size: 1.4rem;
    }
}

/* ========================================
   THEME SWITCH
   ======================================== */

.theme-switch {
    position: fixed;
    top: 100px;
    right: 20px;
    z-index: 1000;
}

.theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    width: 48px;
    height: 48px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-all);
    box-shadow: var(--shadow-md);
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.theme-toggle .fa-moon,
.theme-toggle .fa-sun {
    font-size: 1.2rem;
    color: var(--text-primary);
    transition: opacity 0.3s ease;
}

[data-theme="dark"] .theme-toggle .fa-sun {
    display: none;
}

[data-theme="dark"] .theme-toggle .fa-moon {
    display: block;
}

[data-theme="light"] .theme-toggle .fa-moon {
    display: none;
}

[data-theme="light"] .theme-toggle .fa-sun {
    display: block;
}

/* ========================================
   NAV SEARCH
   ======================================== */

.nav-search {
    display: flex;
    align-items: center;
    position: relative;
}

.search-toggle {
    background: none;
    border: none;
    color: var(--navbar-text);
    font-size: 1.1rem;
    cursor: pointer;
    padding: var(--space-2);
    transition: var(--transition-all);
}

.search-toggle:hover {
    color: var(--accent-color);
}

.search-container {
    position: absolute;
    top: 100%;
    right: 0;
    width: 300px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-all);
    margin-top: 10px;
    overflow: hidden;
}

.search-container.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.search-input {
    width: 100%;
    padding: var(--space-4);
    border: none;
    background: transparent;
    color: var(--text-primary);
    font-size: var(--text-base);
    outline: none;
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-results {
    max-height: 300px;
    overflow-y: auto;
}

.search-result-item {
    padding: var(--space-4);
    border-top: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.search-result-item:hover {
    background: var(--bg-secondary);
}

.search-result-item h4 {
    color: var(--text-primary);
    margin-bottom: var(--space-2);
    font-size: var(--text-base);
}

.search-result-item p {
    color: var(--text-muted);
    font-size: var(--text-sm);
    margin: 0;
}

/* ========================================
   SKILLS GRID
   ======================================== */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.skill-card {
    text-align: center;
}

.skill-card i {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.skill-card h3 {
    color: var(--text-primary);
    font-size: var(--text-xl);
    margin-bottom: 1rem;
}

.skill-card ul {
    list-style: none;
    text-align: left;
    padding: 0;
}

.skill-card li {
    padding: var(--space-2) 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.skill-card li:last-child {
    border-bottom: none;
}

/* ========================================
   PLATFORMS GRID
   ======================================== */

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.platform-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.platform-card:hover {
    transform: translateY(-6px);
}

.platform-card i {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.platform-card h3 {
    color: var(--text-primary);
    font-size: var(--text-xl);
    margin-bottom: 0.5rem;
}

.platform-card p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.platform-card .rank {
    color: var(--accent-color);
    font-weight: var(--font-bold);
}

.platform-link {
    display: inline-block;
    padding: var(--space-3) var(--space-6);
    background: var(--primary-color);
    color: var(--text-inverse);
    text-decoration: none;
    border-radius: var(--radius-full);
    transition: var(--transition-all);
    font-weight: var(--font-medium);
}

.platform-link:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
}

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

.contact-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.contact-intro {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.social-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
}

.social-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition-all);
}

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

.social-link i {
    font-size: 1.5rem;
    color: var(--accent-color);
}

.social-link span {
    font-weight: var(--font-medium);
}

/* ========================================
   ABOUT PAGE
   ======================================== */

.about {
    min-height: 100vh;
    padding-top: 100px;
}

.about-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
}

.about-content {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 3rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.about-title {
    font-size: var(--text-3xl);
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    text-align: left;
}

.about-intro {
    font-size: var(--text-xl);
    color: var(--accent-color);
    font-weight: var(--font-semibold);
    margin-bottom: 1rem;
}

.about-description {
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.about-highlights {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    color: var(--text-primary);
}

.highlight-item i {
    color: var(--accent-color);
}

.about-achievements {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
}

.about-achievements h3 {
    color: var(--text-primary);
    font-size: var(--text-xl);
    margin-bottom: 1rem;
}

.about-achievements ul {
    list-style: none;
    padding: 0;
}

.about-achievements li {
    padding: var(--space-3) 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.about-achievements li::before {
    content: '\f005';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: var(--accent-color);
}

/* ========================================
   SCROLL DOWN BUTTON
   ======================================== */

.scroll-down {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-full);
    width: 50px;
    height: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-all);
}

.scroll-down:hover {
    border-color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.scroll-down i {
    color: #fff;
    font-size: 1.2rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* ========================================
   MOBILE RESPONSIVE ADDITIONS
   ======================================== */

@media (max-width: 768px) {
    .theme-switch {
        top: 80px;
        right: 10px;
    }

    .theme-toggle {
        width: 40px;
        height: 40px;
    }

    .search-container {
        width: 280px;
        right: -60px;
    }

    .skills-grid,
    .platforms-grid {
        grid-template-columns: 1fr;
    }

    .social-links {
        flex-direction: column;
        align-items: center;
    }

    .social-link {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

    .about-content {
        padding: 1.5rem;
    }

    .about-highlights {
        flex-direction: column;
    }
}

/* ========================================
   RESUME SECTION
   ======================================== */

.resume-section {
    padding: 5rem 2rem;
    background: var(--bg-secondary);
}

.resume-container {
    max-width: 960px;
    margin: 0 auto;
}

.resume-actions {
    display: flex;
    justify-content: center;
    gap: 1.2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.resume-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-full);
    font-weight: var(--font-semibold);
    font-size: var(--text-base);
    text-decoration: none;
    transition: var(--transition-all);
    cursor: pointer;
}

.resume-btn-download {
    background: var(--accent-color);
    color: #fff;
    border: 2px solid var(--accent-color);
    box-shadow: 0 4px 16px rgba(255, 0, 85, 0.35);
}

.resume-btn-download:hover {
    background: transparent;
    color: var(--accent-color);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(255, 0, 85, 0.45);
}

.resume-btn-view {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.resume-btn-view:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.resume-viewer {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    overflow: hidden;
    position: relative;
}

.resume-viewer iframe {
    width: 100%;
    height: 780px;
    border: none;
    display: block;
}

@media (max-width: 768px) {
    .resume-viewer iframe {
        height: 500px;
    }

    .resume-actions {
        flex-direction: column;
        align-items: center;
    }

    .resume-btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}