/* ==========================================================================
   PORTFOLIO MODERN CSS DESIGN SYSTEM
   ========================================================================== */

/* Design Tokens & Theme Variables */
:root {
    /* Color Palette - Dark Theme (Default) */
    --bg-base: #0a0f1d;
    --bg-surface: rgba(18, 26, 47, 0.7);
    --bg-surface-solid: #121a2f;
    --bg-card: rgba(22, 33, 62, 0.6);
    --bg-card-hover: rgba(29, 44, 82, 0.8);

    --border-color: rgba(255, 255, 255, 0.08);
    --border-color-hover: rgba(255, 255, 255, 0.15);

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-primary: #06b6d4;
    /* Cyber Teal */
    --accent-secondary: #3b82f6;
    /* Vibrant Blue */
    --accent-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
    --accent-glow: rgba(6, 182, 212, 0.3);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.4);

    --glass-blur: blur(16px);
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-bounce: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);

    --font-heading: 'Outfit', 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
}

/* Light Theme Variables */
html[data-theme="light"] {
    --bg-base: #f8fafc;
    --bg-surface: rgba(255, 255, 255, 0.7);
    --bg-surface-solid: #ffffff;
    --bg-card: rgba(241, 245, 249, 0.8);
    --bg-card-hover: rgba(226, 232, 240, 0.9);

    --border-color: rgba(0, 0, 0, 0.06);
    --border-color-hover: rgba(0, 0, 0, 0.12);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;

    --accent-primary: #2563eb;
    /* Tech Blue */
    --accent-secondary: #0891b2;
    /* Dark Cyan */
    --accent-gradient: linear-gradient(135deg, #2563eb 0%, #0891b2 100%);
    --accent-glow: rgba(37, 99, 235, 0.15);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
}

/* CSS Resets & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-base);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color-hover);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* Core Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section-padding {
    padding: 7rem 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
}

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

button,
input,
textarea {
    font-family: inherit;
    background: none;
    border: none;
    outline: none;
}

/* Buttons System */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition-bounce);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent-gradient);
    color: #ffffff;
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--accent-glow);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
    transform: translateY(-3px);
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-text {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.btn-text:hover {
    color: var(--text-primary);
}

.btn-text:hover i {
    transform: translate(3px, -3px);
}

/* Badges and Gradients */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #22c55e;
    box-shadow: 0 0 8px #22c55e;
    animation: pulse-glow 2s infinite;
}

.text-gradient {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ==========================================================================
   1. NAVIGATION BAR
   ========================================================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-smooth);
}

.header.scrolled {
    padding: 0.5rem 0;
    box-shadow: var(--shadow-md);
}

.nav-container {
    height: 4.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.4rem;
    letter-spacing: -0.5px;
}

.logo-accent {
    color: var(--accent-primary);
}

.nav-menu-desktop ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
    position: relative;
    padding: 0.5rem 0;
}

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

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

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Theme Toggle Button */
.theme-btn {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    transition: var(--transition-bounce);
}

.theme-btn:hover {
    transform: rotate(15deg) scale(1.05);
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
}

.icon-moon,
.icon-sun {
    position: absolute;
    transition: transform 0.4s ease, opacity 0.4s ease;
}

/* Toggle icon display based on theme */
html[data-theme="dark"] .icon-sun {
    opacity: 0;
    transform: scale(0.5) rotate(90deg);
}

html[data-theme="dark"] .icon-moon {
    opacity: 1;
    transform: scale(1) rotate(0);
}

html[data-theme="light"] .icon-moon {
    opacity: 0;
    transform: scale(0.5) rotate(-90deg);
}

html[data-theme="light"] .icon-sun {
    opacity: 1;
    transform: scale(1) rotate(0);
}

/* Hamburger Button Mobile */
.hamburger-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 1.8rem;
    height: 1.2rem;
    cursor: pointer;
}

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

.hamburger-btn.active .bar:nth-child(1) {
    transform: translateY(5px) rotate(45deg);
}

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

.hamburger-btn.active .bar:nth-child(3) {
    transform: translateY(-5px) rotate(-45deg);
}

/* Mobile Dropdown Nav */
.nav-menu-mobile {
    display: none;
    background: var(--bg-surface-solid);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    box-shadow: var(--shadow-lg);
}

.nav-menu-mobile ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.mobile-nav-link {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-secondary);
    display: block;
    padding: 0.5rem 0;
}

.mobile-nav-link.active,
.mobile-nav-link:hover {
    color: var(--text-primary);
    padding-left: 0.5rem;
    border-left: 3px solid var(--accent-primary);
}

/* ==========================================================================
   2. HERO SECTION
   ========================================================================== */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 6rem;
    padding-bottom: 4rem;
    overflow: hidden;
}

.hero-bg-gradients {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.gradient-sphere {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.15;
}

html[data-theme="light"] .gradient-sphere {
    opacity: 0.08;
}

.sphere-1 {
    width: 400px;
    height: 400px;
    background: var(--accent-primary);
    top: 15%;
    right: -10%;
}

.sphere-2 {
    width: 350px;
    height: 350px;
    background: var(--accent-secondary);
    bottom: 10%;
    left: -5%;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    align-items: center;
    gap: 3rem;
}

.hero-content {
    animation: fade-up 1s var(--transition-smooth);
}

.hero-title {
    font-size: 3.2rem;
    letter-spacing: -1.5px;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1.2rem;
    flex-wrap: wrap;
}

/* Hero Avatar Area & Keyframes Floating badges */
.hero-avatar-area {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: scale-up 1.2s var(--transition-smooth);
}

.avatar-frame-glow {
    position: absolute;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: var(--accent-gradient);
    filter: blur(25px);
    opacity: 0.25;
    animation: pulse-glow 4s infinite;
}

.avatar-wrapper {
    position: relative;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    padding: 5px;
    background: var(--accent-gradient);
    box-shadow: var(--shadow-lg);
    z-index: 2;
    overflow: hidden;
}

.profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    background-color: var(--bg-surface-solid);
    transition: var(--transition-smooth);
}

.hover-img {
    display: none;
}

.avatar-wrapper:hover .default-img {
    display: none;
}

.avatar-wrapper:hover .hover-img {
    display: block;
}

/* Floating Tech Badges */
.floating-tech-badge {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    padding: 0.6rem 1.2rem;
    border-radius: 50px;
    z-index: 5;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.floating-tech-badge span {
    font-weight: 600;
    font-size: 0.85rem;
}

.badge-react {
    top: 15%;
    left: 0;
    animation: float 5s ease-in-out infinite;
}

.tech-icon-react {
    color: #61dafb;
    animation: spin 8s linear infinite;
}

.badge-figma {
    bottom: 20%;
    right: 0;
    animation: float-reverse 6s ease-in-out infinite;
}

.tech-icon-figma {
    color: #f24e1e;
}

.scroll-down-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.mouse-icon {
    width: 26px;
    height: 42px;
    border-radius: 15px;
    border: 2px solid var(--text-secondary);
    position: relative;
}

.wheel {
    width: 4px;
    height: 8px;
    background-color: var(--accent-primary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: scroll-wheel 1.6s infinite;
}

/* ==========================================================================
   3. SECTION HEADER
   ========================================================================== */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.sub-title {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--accent-primary);
    display: block;
    margin-bottom: 0.5rem;
}

.section-title {
    font-size: 2.2rem;
    letter-spacing: -0.5px;
    margin-bottom: 1rem;
}

.header-line {
    width: 60px;
    height: 4px;
    background: var(--accent-gradient);
    margin: 0 auto;
    border-radius: 2px;
}

/* ==========================================================================
   4. ABOUT ME
   ========================================================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
    align-items: center;
}

.about-info-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    border-radius: 24px;
    box-shadow: var(--shadow-md);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.about-info-card h3 {
    font-size: 1.6rem;
    margin-bottom: 1.2rem;
}

.about-info-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.personal-details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

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

.detail-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
}

.detail-val {
    font-weight: 600;
    color: var(--text-primary);
}

.experience-stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2.5rem 1.5rem;
    border-radius: 20px;
    text-align: center;
    transition: var(--transition-bounce);
    box-shadow: var(--shadow-sm);
}

.stat-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 10px 25px var(--accent-glow);
}

.stat-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    display: block;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* ==========================================================================
   5. SKILLS SECTION
   ========================================================================== */
.skills-layout {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
    align-items: flex-start;
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 1.5rem;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    transition: var(--transition-smooth);
}

.skill-card:hover {
    border-color: var(--border-color-hover);
    background-color: var(--bg-card-hover);
    transform: translateY(-3px);
}

.skill-icon-box {
    width: 2.8rem;
    height: 2.8rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.skill-icon-box i {
    width: 1.4rem;
    height: 1.4rem;
}

/* Skill Icon colors & background states */
.skill-react {
    background: rgba(97, 218, 251, 0.1);
    color: #61dafb;
}

.skill-node {
    background: rgba(76, 175, 80, 0.1);
    color: #4caf50;
}

.skill-tailwind {
    background: rgba(56, 189, 248, 0.1);
    color: #38bdf8;
}

.skill-figma {
    background: rgba(242, 78, 30, 0.1);
    color: #f24e1e;
}

.skill-db {
    background: rgba(0, 150, 136, 0.1);
    color: #009688;
}

.skill-cloud {
    background: rgba(255, 152, 0, 0.1);
    color: #ff9800;
}

.skill-info h4 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.skill-info p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Skills Progress bars */
.skills-progress-area {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    border-radius: 24px;
}

.progress-title {
    font-size: 1.4rem;
    margin-bottom: 2rem;
}

.progress-wrapper {
    margin-bottom: 1.5rem;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.progress-track {
    width: 100%;
    height: 8px;
    background: var(--bg-base);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 4px;
    transition: width 1.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   6. PROJECTS/PORTFOLIO SECTION
   ========================================================================== */
.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 0.8rem;
    margin-bottom: 3.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.6rem 1.4rem;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 50px;
    background: var(--bg-card);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition-bounce);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--accent-gradient);
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 2.5rem;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    overflow: hidden;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
}

.project-card:hover {
    transform: translateY(-8px) scale(1.01);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-lg);
}

.project-img-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.project-card:hover .project-img {
    transform: scale(1.08);
}

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 15, 29, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 3;
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.overlay-links {
    display: flex;
    gap: 1rem;
}

.overlay-link-btn {
    width: 3.2rem;
    height: 3.2rem;
    border-radius: 50%;
    background: var(--bg-surface-solid);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition-bounce);
    box-shadow: var(--shadow-md);
}

.overlay-link-btn:hover {
    background: var(--accent-gradient);
    color: #ffffff;
    transform: scale(1.1);
}

.project-details {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.project-category {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.project-title {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
}

.project-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.5;
    flex-grow: 1;
}

.project-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.tag {
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.3rem 0.8rem;
    border-radius: 50px;
    background: var(--bg-base);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.project-actions {
    border-top: 1px solid var(--border-color);
    padding-top: 1.2rem;
}

/* ==========================================================================
   7. CONTACT SECTION
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 4rem;
    align-items: flex-start;
}

.contact-info-area h3 {
    font-size: 1.8rem;
    margin-bottom: 1.2rem;
}

.contact-intro-text {
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.contact-item-card {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 16px;
    transition: var(--transition-smooth);
}

.contact-item-card:hover {
    border-color: var(--accent-primary);
    transform: translateX(5px);
}

.contact-item-icon {
    width: 3rem;
    height: 3rem;
    border-radius: 12px;
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-item-icon i {
    width: 1.5rem;
    height: 1.5rem;
}

.contact-item-details span {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.contact-item-details a,
.contact-item-details p {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

.social-links-area h4 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.social-row {
    display: flex;
    gap: 1rem;
}

.social-icon-btn {
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-bounce);
}

.social-icon-btn:hover {
    background: var(--accent-gradient);
    color: #ffffff;
    border-color: transparent;
    transform: translateY(-5px);
}

/* Brand-specific hover colors */
.social-facebook:hover {
    background: #1877F2;
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 6px 20px rgba(24, 119, 242, 0.45);
}

.social-github:hover {
    background: #24292e;
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 6px 20px rgba(36, 41, 46, 0.45);
}

html[data-theme="light"] .social-github:hover {
    background: #24292e;
    color: #ffffff;
}

.social-gmail:hover {
    background: #EA4335;
    color: #ffffff;
    border-color: transparent;
    box-shadow: 0 6px 20px rgba(234, 67, 53, 0.45);
}

.social-gmail .gmail-icon {
    width: 1.25rem;
    height: 1.25rem;
}

/* Contact Form UI */
.contact-form-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 3rem;
    border-radius: 24px;
    box-shadow: var(--shadow-md);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
    color: var(--text-secondary);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 1.2rem;
    width: 1.2rem;
    height: 1.2rem;
    color: var(--text-muted);
    pointer-events: none;
    transition: var(--transition-smooth);
}

.form-input {
    width: 100%;
    padding: 0.95rem 1.2rem 0.95rem 3rem;
    border-radius: 12px;
    background: var(--bg-base);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.form-textarea {
    padding-left: 1.2rem;
    resize: none;
}

.text-area-wrapper {
    display: block;
}

.form-input:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input:focus~.input-icon {
    color: var(--accent-primary);
}

/* Input validation states */
.form-input.error {
    border-color: #ef4444;
}

.error-msg {
    display: none;
    color: #ef4444;
    font-size: 0.8rem;
    margin-top: 0.4rem;
    font-weight: 500;
}

.form-group.has-error .error-msg {
    display: block;
}

/* Spinner for submit button loading */
.spinner {
    width: 1.2rem;
    height: 1.2rem;
    border: 2px solid transparent;
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.hidden {
    display: none !important;
}

/* ==========================================================================
   8. FOOTER
   ========================================================================== */
.footer {
    background: var(--bg-surface-solid);
    border-top: 1px solid var(--border-color);
    padding: 5rem 0 0 0;
}

.footer-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    padding-bottom: 4rem;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 1rem;
    max-width: 350px;
}

.footer-links-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.footer-links-col h4 {
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.footer-links-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.footer-links-col a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-links-col a:hover {
    color: var(--accent-primary);
    padding-left: 5px;
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
}

.footer-bottom-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-bottom-links {
    display: flex;
    gap: 1.5rem;
}

/* ==========================================================================
   9. FLOATING BUTTON & TOAST NOTIFICATION
   ========================================================================== */
.back-to-top-btn {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3.2rem;
    height: 3.2rem;
    border-radius: 50%;
    background: var(--accent-gradient);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-bounce);
    box-shadow: var(--shadow-md);
    z-index: 99;
}

.back-to-top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px var(--accent-glow);
}

/* Toast System */
.toast-container {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    pointer-events: none;
}

.toast {
    background: var(--bg-surface-solid);
    border: 1px solid var(--accent-primary);
    box-shadow: var(--shadow-lg);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    transform: translateX(-50px);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    pointer-events: auto;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.toast.show {
    transform: translateX(0);
    opacity: 1;
}

.toast-success {
    border-left: 5px solid #22c55e;
}

.toast-success i {
    color: #22c55e;
}

/* ==========================================================================
   10. KEYFRAME ANIMATIONS
   ========================================================================== */
@keyframes pulse-glow {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.25;
    }

    50% {
        transform: scale(1.05);
        opacity: 0.4;
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-12px);
    }
}

@keyframes float-reverse {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(12px);
    }
}

@keyframes scroll-wheel {
    0% {
        transform: translate(-50%, 0);
        opacity: 1;
    }

    100% {
        transform: translate(-50%, 15px);
        opacity: 0;
    }
}

@keyframes fade-up {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scale-up {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ==========================================================================
   8. BOTTOM NAVIGATION BAR (Mobile Only)
   ========================================================================== */
.bottom-nav {
    display: none; /* Hidden on desktop — shown via media query on mobile */
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 68px;
    background: var(--bg-surface-solid);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-top: 1px solid var(--border-color);
    box-shadow: 0 -4px 30px rgba(0, 0, 0, 0.25);
    justify-content: space-around;
    align-items: stretch;
    z-index: 1000;
    /* iOS safe-area support */
    padding-bottom: env(safe-area-inset-bottom, 0px);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    gap: 4px;
    padding: 10px 4px;
    color: var(--text-muted);
    font-size: 0.68rem;
    font-weight: 500;
    font-family: var(--font-body);
    text-decoration: none;
    cursor: pointer;
    border: none;
    background: transparent;
    position: relative;
    transition: color 0.25s ease;
    -webkit-tap-highlight-color: transparent;
}

.bottom-nav-item::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 48px;
    height: 30px;
    background: var(--accent-glow);
    border-radius: 10px;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.bottom-nav-item i {
    width: 1.4rem;
    height: 1.4rem;
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), color 0.25s ease;
    position: relative;
    z-index: 1;
}

.bottom-nav-item span {
    position: relative;
    z-index: 1;
    transition: color 0.25s ease;
}

/* Active State */
.bottom-nav-item.active {
    color: var(--accent-primary);
}

.bottom-nav-item.active::before {
    transform: translateX(-50%) scaleX(1);
}

.bottom-nav-item.active i {
    transform: translateY(-2px) scale(1.15);
    color: var(--accent-primary);
    filter: drop-shadow(0 0 6px var(--accent-glow));
}

/* Tap ripple */
.bottom-nav-item:active i {
    transform: scale(0.9);
}

/* ==========================================================================
   11. RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */

/* Tablet Screens (max-width: 992px) */
@media screen and (max-width: 992px) {
    html {
        font-size: 15px;
    }

    .section-padding {
        padding: 5rem 0;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 4rem;
    }

    .hero-avatar-area {
        order: -1;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .skills-layout {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

/* Mobile Screens (max-width: 768px) */
@media screen and (max-width: 768px) {
    .nav-menu-desktop {
        display: none;
    }

    .hamburger-btn {
        display: flex;
    }

    .hero-title {
        font-size: 2.4rem;
    }

    .personal-details-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .experience-stats-grid {
        gap: 1rem;
    }

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

    .contact-form-card {
        padding: 2rem;
    }

    .toast-container {
        left: 1rem;
        right: 1rem;
        bottom: 1rem;
    }

    .toast {
        width: 100%;
    }

    .bottom-nav {
        display: flex;
    }

    body {
        padding-bottom: calc(68px + env(safe-area-inset-bottom, 0px));
    }

    .back-to-top-btn {
        bottom: 5.5rem;
        right: 1.5rem;
    }
}

/* Large Screens (min-width: 1200px) */
@media screen and (min-width: 1200px) {
    .container {
        padding: 0;
    }
}