/* ==========================================================================
   Design System & Variables (Inspiración: Longevity AI App)
   ========================================================================== */
:root {
    /* Color Palette */
    --bg-light: #ffffff;
    --bg-dark: #050811;
    --bg-dark-secondary: #090e1c;
    
    /* Interactive States & Surfaces */
    --surface-light: #ffffff;
    --surface-dark: rgba(13, 19, 36, 0.45);
    --surface-dark-hover: rgba(22, 31, 58, 0.65);
    
    /* Brand Accents (Mockup Hologram Colors) */
    --accent-cyan: #38bdf8;
    --accent-cyan-rgb: 56, 189, 248;
    --accent-violet: #a855f7;
    --accent-violet-rgb: 168, 85, 247;
    --accent-peach: #f97316;
    --accent-peach-rgb: 249, 115, 22;
    --accent-emerald: #10b981;
    
    /* Typography Colors */
    --text-dark-primary: #090a0f;
    --text-dark-secondary: #4b5563;
    --text-dark-muted: #8e939e;
    
    --text-light-primary: #ffffff;
    --text-light-secondary: #9ca3af;
    --text-light-muted: #6b7280;
    
    /* Borders & Rounding (Inspired by 24px App mockup) */
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    
    --border-light: rgba(10, 15, 30, 0.08);
    --border-dark: rgba(255, 255, 255, 0.06);
    --border-glow: rgba(56, 189, 248, 0.3);
    
    /* Shadows */
    --shadow-minimal: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 12px 30px rgba(0, 0, 0, 0.08);
    --shadow-dark-card: 0 20px 40px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 30px rgba(56, 189, 248, 0.15);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, sans-serif;
    --font-display: 'Plus Jakarta Sans', -apple-system, sans-serif;
    
    /* Transitions */
    --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.15);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    font-size: 16px;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-cyan);
}

/* ==========================================================================
   Background Ambient Light (Blobs & Volumetric Rays)
   ========================================================================== */
.glow-blob {
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    filter: blur(140px);
    opacity: 0.08;
    z-index: -1;
    pointer-events: none;
    animation: blob-float-slow 25s infinite alternate ease-in-out;
}

.glow-1 {
    background: var(--accent-cyan);
    top: 25%;
    left: -15%;
    animation-delay: 0s;
}

.glow-2 {
    background: var(--accent-violet);
    top: 55%;
    right: -15%;
    animation-delay: 6s;
}

.glow-3 {
    background: var(--accent-peach);
    top: 80%;
    left: 20%;
    animation-delay: 12s;
}

@keyframes blob-float-slow {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(60px, -60px) scale(1.2); }
    100% { transform: translate(-40px, 40px) scale(0.9); }
}

/* ==========================================================================
   Typography & Elements
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    letter-spacing: -0.025em;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-smooth);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.section-container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 100px 24px;
}

/* Section Header (Inspired by App layout) */
.section-header {
    margin-bottom: 60px;
    text-align: center;
    position: relative;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #ffffff 40%, var(--text-light-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-divider {
    width: 40px;
    height: 3px;
    background: var(--accent-cyan);
    margin: 0 auto;
    border-radius: 2px;
}

/* ==========================================================================
   Buttons (Pill & Circular Shapes)
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 50px; /* Pill shape */
    cursor: pointer;
    transition: var(--transition-smooth);
    border: 1px solid transparent;
    gap: 10px;
}

/* Primary Button - Dark Pill (from "Ponte en contacto" in mockup) */
.btn-primary {
    background-color: var(--text-dark-primary);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.btn-primary:hover {
    transform: translateY(-2px);
    background-color: #111425;
    border-color: rgba(255, 255, 255, 0.25);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* Secondary Button - Light/Outline Pill */
.btn-secondary {
    background: transparent;
    color: var(--text-dark-primary);
    border: 1px solid var(--border-light);
}

.btn-secondary:hover {
    background: rgba(0, 0, 0, 0.02);
    border-color: var(--text-dark-secondary);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* ==========================================================================
   Header & Navigation (Light Background)
   ========================================================================== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--border-light);
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(16px);
    transition: var(--transition-smooth);
}

.main-header.scrolled {
    padding: 8px 0;
    box-shadow: var(--shadow-minimal);
}

.header-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 850;
    letter-spacing: -0.04em;
    display: flex;
    align-items: center;
    color: var(--text-dark-primary);
}

.logo-dot {
    color: var(--accent-cyan);
    margin: 0 1px;
}

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 36px;
}

.nav-link {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-dark-secondary);
    position: relative;
    padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-dark-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-cyan);
    transition: var(--transition-smooth);
    border-radius: 2px;
}

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

/* Hamburger for Mobile */
.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 20px;
    height: 14px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.mobile-toggle .bar {
    width: 100%;
    height: 2px;
    background-color: var(--text-dark-primary);
    border-radius: 1px;
    transition: var(--transition-smooth);
}

/* ==========================================================================
   Hero Section (Pure White - Clean Mockup Style)
   ========================================================================== */
.hero-section {
    padding-top: 130px;
    background-color: var(--bg-light);
    color: var(--text-dark-primary);
    position: relative;
    overflow: hidden;
}

/* Subtle soft light shadow line dividing hero and rest of body */
.hero-section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 120px;
    background: linear-gradient(180deg, transparent 0%, var(--bg-dark) 100%);
    pointer-events: none;
}

.hero-container {
    display: flex;
    align-items: center;
    gap: 80px;
    min-height: calc(85vh - 130px);
    position: relative;
    z-index: 5;
    padding-bottom: 120px;
}

.hero-content {
    flex: 1.25;
}

.hero-image-wrapper {
    flex: 0.75;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* State green Badge (longevity app style) */
.badge-available {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--accent-emerald);
    padding: 0;
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 20px;
    font-family: var(--font-display);
}

.badge-dot {
    width: 7px;
    height: 7px;
    background-color: var(--accent-emerald);
    border-radius: 50%;
    animation: pulse-green 2s infinite;
}

@keyframes pulse-green {
    0% { transform: scale(0.9); opacity: 0.6; }
    50% { transform: scale(1.3); opacity: 1; }
    100% { transform: scale(0.9); opacity: 0.6; }
}

/* Huge Bold Editorial Title */
.hero-title {
    font-size: 3.2rem;
    line-height: 1.15;
    margin-bottom: 24px;
    font-weight: 850;
    letter-spacing: -0.04em;
    color: var(--text-dark-primary);
}

.highlight-gradient {
    color: var(--text-dark-primary);
    background: none;
    -webkit-background-clip: initial;
    -webkit-text-fill-color: initial;
    border-bottom: 3px solid var(--accent-cyan);
}

.hero-subtitle {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--text-dark-secondary);
    font-weight: 600;
    margin-bottom: 20px;
    line-height: 1.5;
    border-left: 2px solid var(--accent-cyan);
    padding-left: 14px;
}

.hero-description {
    color: var(--text-dark-muted);
    font-size: 1.05rem;
    margin-bottom: 36px;
    max-width: 520px;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 40px;
}

/* Hero primary button - pill dark */
.hero-actions .btn-primary {
    background-color: var(--text-dark-primary);
    color: #ffffff;
    border-color: var(--text-dark-primary);
}

.hero-actions .btn-primary:hover {
    background-color: #222538;
}

/* Social links (circular buttons with tiny border from reference header) */
.social-links {
    display: flex;
    gap: 12px;
}

.social-icon-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%; /* Pure circular shape */
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-dark-secondary);
    transition: var(--transition-bounce);
}

.social-icon-link:hover {
    color: var(--text-dark-primary);
    border-color: var(--text-dark-primary);
    transform: scale(1.08);
    background: rgba(0, 0, 0, 0.02);
}

/* Circular avatar layout (Dark device mockup concept) */
.avatar-frame {
    position: relative;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    padding: 5px;
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.2) 0%, rgba(168, 85, 247, 0.2) 100%);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 4px solid #ffffff;
    background-color: var(--bg-dark-secondary);
    position: relative;
    z-index: 2;
}

.avatar-glow {
    position: absolute;
    top: -5px;
    left: -5px;
    width: calc(100% + 10px);
    height: calc(100% + 10px);
    border-radius: 50%;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.15) 0%, rgba(168, 85, 247, 0.05) 70%);
    z-index: 1;
    pointer-events: none;
}

.floating-tech {
    position: absolute;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.95);
    border: 1px solid var(--border-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-dark-primary);
    box-shadow: var(--shadow-minimal);
    z-index: 5;
}

.tech-py {
    top: 5%;
    left: -5%;
    color: #387eb8;
    animation: float-y 5s infinite ease-in-out;
}

.tech-js {
    bottom: 10%;
    right: -5%;
    color: #cca400;
    animation: float-y 6s infinite ease-in-out 1s;
}

.tech-db {
    bottom: -5%;
    left: 15%;
    color: var(--accent-cyan);
    animation: float-y 7s infinite ease-in-out 0.5s;
}

@keyframes float-y {
    0% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0); }
}

/* ==========================================================================
   About Me Section (Dark Premium Layout)
   ========================================================================== */
.about-section {
    background-color: var(--bg-dark);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 60px;
    align-items: center;
}

.about-text {
    font-size: 1.05rem;
    color: var(--text-light-secondary);
    margin-bottom: 24px;
}

.about-text strong {
    color: var(--text-light-primary);
    font-weight: 600;
}

.about-bullets {
    display: flex;
    flex-direction: column;
    gap: 18px;
    margin-top: 32px;
}

.bullet-item {
    display: flex;
    align-items: center;
    gap: 14px;
    color: var(--text-light-primary);
    font-weight: 500;
}

.bullet-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: rgba(56, 189, 248, 0.08);
    border: 1px solid rgba(56, 189, 248, 0.15);
    color: var(--accent-cyan);
}

/* Stat card (Styled as rounded glass UI card) */
.about-stat-card {
    position: relative;
    padding: 1px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.02) 100%);
    box-shadow: var(--shadow-dark-card);
}

.stat-glass {
    background-color: rgba(9, 13, 27, 0.7);
    border-radius: 23px;
    padding: 36px 30px;
    backdrop-filter: blur(12px);
}

.stat-title {
    font-size: 1.2rem;
    margin-bottom: 30px;
    text-align: center;
    font-weight: 700;
    color: var(--text-light-primary);
}

.stat-bars {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.stat-bar-item {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.stat-bar-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-light-secondary);
}

.stat-bar-track {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 20px;
    overflow: hidden;
}

.stat-bar-fill {
    height: 100%;
    border-radius: 20px;
    width: 0;
    transition: width 1.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Neon Glow Fills based on health app diagram */
.fill-front {
    width: 80%;
    background: linear-gradient(90deg, var(--accent-cyan) 0%, var(--accent-violet) 100%);
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.3);
}

.fill-back {
    width: 75%;
    background: linear-gradient(90deg, var(--accent-violet) 0%, var(--accent-peach) 100%);
    box-shadow: 0 0 10px rgba(168, 85, 247, 0.3);
}

.fill-ai {
    width: 70%;
    background: linear-gradient(90deg, var(--accent-peach) 0%, var(--accent-cyan) 100%);
    box-shadow: 0 0 10px rgba(249, 115, 22, 0.3);
}

/* ==========================================================================
   Skills Section
   ========================================================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 20px;
}

.skill-card {
    background: var(--surface-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg); /* Rounded 24px */
    padding: 28px 16px;
    text-align: center;
    transition: var(--transition-bounce);
    cursor: default;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(12px);
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at top right, rgba(56, 189, 248, 0.08), transparent 70%);
    opacity: 0;
    transition: var(--transition-smooth);
}

.skill-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-glow);
    background: var(--surface-dark-hover);
    box-shadow: var(--shadow-glow), var(--shadow-dark-card);
}

.skill-card:hover::before {
    opacity: 1;
}

.skill-icon-wrapper {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-dark);
    color: var(--text-light-secondary);
    transition: var(--transition-bounce);
}

.skill-card:hover .skill-icon-wrapper {
    color: #ffffff;
    transform: scale(1.08);
    background: rgba(56, 189, 248, 0.08);
    border-color: rgba(56, 189, 248, 0.2);
}

/* Custom Skill Hover Colors */
.skill-card[data-skill="html"]:hover .skill-icon { color: #e34c26; }
.skill-card[data-skill="css"]:hover .skill-icon { color: #264de4; }
.skill-card[data-skill="javascript"]:hover .skill-icon { color: #f7df1e; }
.skill-card[data-skill="python"]:hover .skill-icon { color: #387eb8; }
.skill-card[data-skill="sql"]:hover .skill-icon { color: #4479a1; }
.skill-card[data-skill="git"]:hover .skill-icon { color: #f05032; }
.skill-card[data-skill="github"]:hover .skill-icon { color: #ffffff; }
.skill-card[data-skill="supabase"]:hover .skill-icon { color: #3ecf8e; }
.skill-card[data-skill="frontend"]:hover .skill-icon { color: var(--accent-cyan); }
.skill-card[data-skill="backend"]:hover .skill-icon { color: var(--accent-violet); }
.skill-card[data-skill="fullstack"]:hover .skill-icon { color: var(--accent-peach); }
.skill-card[data-skill="ai"]:hover .skill-icon { color: var(--accent-emerald); }

.skill-name {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 10px;
    font-family: var(--font-display);
    color: var(--text-light-primary);
}

.skill-tag {
    display: inline-block;
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.tag-front { background: rgba(56, 189, 248, 0.08); color: var(--accent-cyan); }
.tag-back { background: rgba(168, 85, 247, 0.08); color: var(--accent-violet); }
.tag-tool { background: rgba(255, 255, 255, 0.05); color: var(--text-light-secondary); }
.tag-concept { background: rgba(249, 115, 22, 0.08); color: var(--accent-peach); }
.tag-ai { background: rgba(16, 185, 129, 0.08); color: var(--accent-emerald); }

/* ==========================================================================
   Projects Section
   ========================================================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--surface-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg); /* Rounded 24px */
    overflow: hidden;
    transition: var(--transition-bounce);
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(12px);
}

.project-card:hover {
    transform: translateY(-6px);
    border-color: rgba(56, 189, 248, 0.25);
    box-shadow: var(--shadow-glow), var(--shadow-dark-card);
}

/* Project banner graphic container */
.project-banner {
    height: 170px;
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.03) 0%, rgba(168, 85, 247, 0.03) 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    border-bottom: 1px solid var(--border-dark);
}

.project-banner-overlay {
    position: absolute;
    top: 14px;
    right: 14px;
    z-index: 5;
}

.project-badge {
    background-color: var(--text-light-primary);
    color: var(--bg-dark);
    font-size: 0.72rem;
    font-weight: 750;
    padding: 3px 8px;
    border-radius: 4px;
    text-transform: uppercase;
}

.project-graphic {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.graphic-svg {
    max-height: 100px;
    filter: drop-shadow(0 6px 12px rgba(0,0,0,0.4));
}

.project-info {
    padding: 30px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-name {
    font-size: 1.3rem;
    font-weight: 750;
    margin-bottom: 12px;
    color: var(--text-light-primary);
}

.project-description {
    color: var(--text-light-secondary);
    font-size: 0.95rem;
    line-height: 1.55;
    margin-bottom: 22px;
    flex: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.p-tag {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-dark);
    color: var(--text-light-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 6px;
}

.project-links {
    display: flex;
    gap: 12px;
}

.project-link-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 11px 18px;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 50px; /* Pill buttons */
    border: 1px solid var(--border-dark);
    background: rgba(255,255,255,0.01);
    color: var(--text-light-secondary);
}

.project-link-btn:hover {
    color: var(--text-light-primary);
    border-color: rgba(255, 255, 255, 0.15);
}

.project-link-btn.primary {
    background-color: var(--text-light-primary);
    color: var(--bg-dark);
    border: none;
}

.project-link-btn.primary:hover {
    box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

/* Upcoming specific project styling */
.project-card.upcoming {
    border-style: dashed;
    border-width: 1.5px;
    background: rgba(12, 18, 36, 0.2);
}

.upcoming-spinner {
    width: 50px;
    height: 50px;
    position: relative;
}

.spinner-inner {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid transparent;
    border-top-color: var(--accent-violet);
    border-left-color: var(--accent-cyan);
    animation: spin 3s linear infinite;
}

.spinner-inner::after {
    content: '';
    position: absolute;
    top: 5px;
    left: 5px;
    bottom: 5px;
    right: 5px;
    border-radius: 50%;
    border: 2px solid transparent;
    border-top-color: var(--accent-peach);
    opacity: 0.7;
    animation: spin 1.5s linear infinite reverse;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.status-badge {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(56, 189, 248, 0.05);
    border: 1px solid rgba(56, 189, 248, 0.15);
    color: var(--accent-cyan);
    border-radius: 50px; /* Pill */
    font-size: 0.8rem;
    font-weight: 700;
}

/* ==========================================================================
   Education Section
   ========================================================================== */
.timeline {
    position: relative;
    max-width: 760px;
    margin: 0 auto;
}

.timeline::after {
    content: '';
    position: absolute;
    width: 1.5px;
    background: linear-gradient(180deg, var(--accent-cyan) 0%, var(--accent-violet) 50%, transparent 100%);
    top: 0;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.timeline-item {
    padding: 10px 40px;
    position: relative;
    width: 50%;
    left: 0;
}

.timeline-item:nth-child(odd) {
    left: 50%;
}

.timeline-dot {
    position: absolute;
    width: 12px;
    height: 12px;
    right: -6px;
    background-color: var(--bg-dark);
    border: 2.5px solid var(--accent-cyan);
    border-radius: 50%;
    top: 24px;
    z-index: 10;
    box-shadow: 0 0 10px var(--accent-cyan);
    transition: var(--transition-smooth);
}

.timeline-item:nth-child(odd) .timeline-dot {
    left: -6px;
    border-color: var(--accent-violet);
    box-shadow: 0 0 10px var(--accent-violet);
}

.timeline-item:hover .timeline-dot {
    background-color: #ffffff;
    transform: scale(1.3);
}

.timeline-content {
    padding: 28px;
    background: var(--surface-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg); /* Rounded 24px */
    position: relative;
    backdrop-filter: blur(12px);
    transition: var(--transition-smooth);
}

.timeline-content:hover {
    border-color: var(--border-glow);
    transform: translateY(-2px);
    box-shadow: var(--shadow-dark-card);
}

.timeline-date {
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 750;
    color: var(--accent-violet);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.timeline-title {
    font-size: 1.15rem;
    margin-bottom: 6px;
    font-weight: 750;
    color: var(--text-light-primary);
}

.timeline-institution {
    font-size: 0.95rem;
    color: var(--accent-cyan);
    margin-bottom: 12px;
    font-weight: 600;
}

.timeline-description {
    font-size: 0.9rem;
    color: var(--text-light-secondary);
    line-height: 1.5;
    margin-bottom: 16px;
}

.education-skills {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.edu-skill-badge {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border-dark);
    color: var(--text-light-secondary);
    font-size: 0.72rem;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 4px;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 0.95fr 1.05fr;
    gap: 60px;
}

.contact-subtitle {
    font-size: 1.8rem;
    margin-bottom: 16px;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 40%, var(--text-light-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.contact-text {
    color: var(--text-light-secondary);
    font-size: 1.05rem;
    margin-bottom: 36px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-detail-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Circular detail icons (reference buttons) */
.detail-icon {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-dark);
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
}

.detail-content {
    display: flex;
    flex-direction: column;
}

.detail-label {
    font-size: 0.72rem;
    color: var(--text-light-muted);
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.detail-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-light-primary);
}

.detail-value:hover {
    color: var(--accent-cyan);
}

/* Contact Form block (glassmorphic 24px card) */
.contact-form-block {
    background: var(--surface-dark);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-lg);
    padding: 38px;
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-dark-card);
}

.form-group {
    margin-bottom: 22px;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-light-secondary);
    margin-bottom: 8px;
    font-family: var(--font-display);
}

.form-input {
    width: 100%;
    padding: 13px 18px;
    background: rgba(5, 7, 15, 0.6);
    border: 1px solid var(--border-dark);
    border-radius: var(--radius-sm);
    color: var(--text-light-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    background: rgba(5, 7, 15, 0.85);
    box-shadow: 0 0 12px rgba(56, 189, 248, 0.12);
}

.form-input.text-area {
    resize: vertical;
}

/* submit button pill */
.contact-form-block .btn-primary {
    background-color: var(--text-light-primary);
    color: var(--bg-dark);
    border: none;
}

.contact-form-block .btn-primary:hover {
    background-color: rgba(255, 255, 255, 0.9);
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.15);
}

.send-icon {
    transition: transform 0.3s;
}

.btn-primary:hover .send-icon {
    transform: translate(2px, -2px);
}

.form-feedback {
    margin-top: 16px;
    font-size: 0.9rem;
    text-align: center;
    border-radius: 8px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out, padding 0.4s;
    padding: 0;
}

.form-feedback.show {
    max-height: 60px;
    padding: 10px;
}

.form-feedback.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    color: var(--accent-emerald);
}

.form-feedback.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.main-footer {
    border-top: 1px solid var(--border-dark);
    background-color: var(--bg-dark-secondary);
}

.footer-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 44px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}

.footer-copy {
    color: var(--text-light-secondary);
    font-size: 0.9rem;
}

.footer-design {
    color: var(--text-light-muted);
    font-size: 0.85rem;
}

.back-to-top {
    position: absolute;
    right: 24px;
    top: -24px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--text-light-primary);
    color: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: var(--transition-bounce);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(255, 255, 255, 0.15);
}

/* ==========================================================================
   Reveal Animations
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   Media Queries (Responsive Layouts)
   ========================================================================== */

@media (max-width: 1024px) {
    html {
        font-size: 15px;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-container {
        gap: 40px;
    }
    
    .avatar-frame {
        width: 250px;
        height: 250px;
    }
}

@media (max-width: 768px) {
    .mobile-toggle {
        display: flex;
    }
    
    /* Adapt Mobile Navigation menu to Light theme */
    .nav-menu {
        position: fixed;
        top: 75px;
        right: -100%;
        width: 100%;
        height: calc(100vh - 75px);
        background-color: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(16px);
        padding: 50px 24px;
        transition: var(--transition-smooth);
        border-top: 1px solid var(--border-light);
    }
    
    .nav-menu.open {
        right: 0;
    }
    
    .nav-menu ul {
        flex-direction: column;
        align-items: center;
        gap: 36px;
    }
    
    .nav-link {
        font-size: 1.2rem;
        color: var(--text-dark-secondary);
    }
    
    .nav-link:hover, .nav-link.active {
        color: var(--text-dark-primary);
    }
    
    .mobile-toggle.open .bar:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }
    
    .mobile-toggle.open .bar:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-toggle.open .bar:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }
    
    /* Hero section stacked */
    .hero-container {
        flex-direction: column-reverse;
        padding-top: 30px;
        padding-bottom: 80px;
        text-align: center;
        gap: 40px;
        justify-content: center;
    }
    
    .hero-subtitle {
        border-left: none;
        padding-left: 0;
        text-align: center;
    }
    
    .hero-description {
        margin: 0 auto 30px;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    /* About grid stack */
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    /* Projects stack */
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    /* Timeline Mobile styling */
    .timeline::after {
        left: 21px;
    }
    
    .timeline-item {
        width: 100%;
        padding-left: 50px;
        padding-right: 15px;
    }
    
    .timeline-item:nth-child(odd) {
        left: 0%;
    }
    
    .timeline-dot {
        left: 15px !important;
        right: auto;
    }
    
    /* Contact stack */
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-container {
        flex-direction: column;
        gap: 20px;
        text-align: center;
        padding-bottom: 60px;
    }
    
    .back-to-top {
        right: 50%;
        transform: translateX(50%) translateY(0);
    }
    
    .back-to-top:hover {
        transform: translateX(50%) translateY(-4px);
    }
}