/* ===================================
   CSS Variables & Theme Configuration
   =================================== */
:root {
    /* Colors */
    --color-bg: #000000;
    --color-bg-secondary: #0a0a0a;
    --color-bg-card: #111111;
    --color-text-primary: #ffffff;
    --color-text-secondary: #888888;
    --color-text-tertiary: #aaaaaa;
    --color-accent: #64ffda;
    --color-border: #333333;

    /* Spacing */
    --spacing-xs: 10px;
    --spacing-sm: 15px;
    --spacing-md: 20px;
    --spacing-lg: 30px;
    --spacing-xl: 40px;
    --spacing-2xl: 50px;
    --spacing-3xl: 100px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 22px;
    --font-size-3xl: 28px;
    --font-size-4xl: 36px;
    --font-size-5xl: 56px;
    --font-size-6xl: 72px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Borders */
    --border-radius-sm: 5px;
    --border-radius-md: 10px;
    --border-radius-lg: 20px;
    --border-radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(100, 255, 218, 0.3);

    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text-primary);
    font-family: var(--font-family);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Selection */
::selection {
    background-color: var(--color-accent);
    color: var(--color-bg);
}

::-moz-selection {
    background-color: var(--color-accent);
    color: var(--color-bg);
}

/* ===================================
   Container
   =================================== */
.container {
    max-width: 1200px;
    padding: 0 var(--spacing-2xl);
    margin: 0 auto;
}

/* ===================================
   Header & Navigation
   =================================== */
header {
    padding: var(--spacing-xl) 0;
    position: sticky;
    top: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    z-index: var(--z-sticky);
    transition: all var(--transition-base);
}

header.scrolled {
    padding: var(--spacing-md) 0;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.7);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: bold;
    font-size: var(--font-size-4xl);
    transition: transform var(--transition-base);
    cursor: pointer;
}

.logo:hover {
    transform: scale(1.05);
}

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

.nav-item {
    display: flex;
    align-items: center;
    opacity: 0;
    animation: fadeInDown 0.5s ease forwards;
}

.nav-item:nth-child(1) {
    animation-delay: 0.1s;
}

.nav-item:nth-child(2) {
    animation-delay: 0.2s;
}

.nav-item:nth-child(3) {
    animation-delay: 0.3s;
}

.nav-item:nth-child(4) {
    animation-delay: 0.4s;
}

.nav-item:nth-child(5) {
    animation-delay: 0.5s;
}

.nav-item:nth-child(6) {
    animation-delay: 0.6s;
}

.nav-number {
    color: var(--color-accent);
    font-size: var(--font-size-sm);
    margin-right: 5px;
    font-weight: 500;
}

.nav-text {
    color: var(--color-text-primary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-base);
    position: relative;
}

.nav-text::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-base);
}

.nav-text:hover {
    color: var(--color-accent);
}

.nav-text:hover::after {
    width: 100%;
}

.resume-button {
    border: 1px solid var(--color-accent);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    color: var(--color-accent);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.resume-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--color-accent);
    transition: left var(--transition-base);
    z-index: -1;
}

.resume-button:hover {
    color: var(--color-bg);
}

.resume-button:hover::before {
    left: 0;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: var(--z-fixed);
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--color-accent);
    transition: all var(--transition-base);
    transform-origin: center;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    padding: var(--spacing-3xl) 0;
    min-height: calc(100vh - 160px);
    display: flex;
    align-items: center;
}

.hero-small {
    color: var(--color-accent);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-md);
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.2s;
}

.hero-name {
    font-size: var(--font-size-6xl);
    font-weight: bold;
    margin-bottom: var(--spacing-xs);
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.3s;
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: bold;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.4s;
}

.hero-description {
    max-width: 540px;
    color: var(--color-text-tertiary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.8;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.5s;
}

.hero-button {
    display: inline-block;
    border: 1px solid var(--color-accent);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--border-radius-sm);
    color: var(--color-accent);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.6s;
}

.hero-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(100, 255, 218, 0.1);
    transition: left var(--transition-base);
    z-index: -1;
}

.hero-button:hover::before {
    left: 0;
}

.hero-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* ===================================
   Sections
   =================================== */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-header {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.section-number {
    color: var(--color-accent);
    font-size: var(--font-size-xl);
    margin-right: var(--spacing-xs);
    font-weight: 500;
}

.section-title {
    font-size: var(--font-size-3xl);
    font-weight: bold;
    white-space: nowrap;
}

.section-line {
    flex: 1;
    height: 1px;
    background-color: var(--color-border);
    margin-left: var(--spacing-md);
}

/* Fade-in animations for sections */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================================
   Skills Section
   =================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.skill-card {
    background-color: var(--color-bg-card);
    padding: 25px;
    border-radius: var(--border-radius-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    border: 1px solid transparent;
}

.skill-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
    box-shadow: 0 10px 30px rgba(100, 255, 218, 0.1);
}

.skill-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
    color: var(--color-accent);
}

.skill-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
}

/* ===================================
   Projects Section
   =================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background-color: var(--color-bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(100, 255, 218, 0.05), transparent);
    transition: left 0.5s;
}

.project-card:hover::before {
    left: 100%;
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-accent);
    box-shadow: 0 10px 30px rgba(100, 255, 218, 0.1);
}

.project-status {
    color: var(--color-accent);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.project-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
}

.project-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.project-link {
    display: inline-block;
    border: 1px solid var(--color-accent);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius-lg);
    color: var(--color-accent);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
}

.project-link:hover {
    background-color: rgba(100, 255, 218, 0.1);
    transform: translateX(5px);
}

/* ===================================
   Footer
   =================================== */
footer {
    padding: var(--spacing-2xl) 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
    margin-top: var(--spacing-3xl);
}

.footer-title {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-md);
}

.footer-description {
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto var(--spacing-lg);
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 25px;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
}

.social-icon {
    color: var(--color-text-primary);
    font-size: var(--font-size-2xl);
    transition: all var(--transition-base);
    display: inline-block;
}

.social-icon:hover {
    color: var(--color-accent);
    transform: translateY(-3px);
}

.footer-copyright {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* ===================================
   Animations
   =================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

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

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
    }

    to {
        transform: translateX(0);
    }
}

/* ===================================
   Responsive Design
   =================================== */
@media screen and (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

@media screen and (max-width: 768px) {
    :root {
        --font-size-6xl: 42px;
        --font-size-5xl: 36px;
        --font-size-3xl: 24px;
    }

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

    .mobile-menu-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: min(300px, 75vw);
        height: 100vh;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: center;
        align-items: flex-start;
        padding: var(--spacing-2xl);
        gap: var(--spacing-xl);
        transition: right var(--transition-slow);
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-item {
        opacity: 1;
        animation: none;
    }

    .hero {
        padding: var(--spacing-2xl) 0;
        min-height: auto;
    }

    .hero-description {
        font-size: var(--font-size-base);
    }

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

    .section {
        padding: var(--spacing-2xl) 0;
    }
}

@media screen and (max-width: 480px) {
    :root {
        --font-size-6xl: 32px;
        --font-size-5xl: 28px;
    }

    .section-title {
        font-size: var(--font-size-xl);
    }

    .section-line {
        display: none;
    }
}

/* ===================================
   Accessibility
   =================================== */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}

/* Skip to main content link for accessibility */
.skip-to-main {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-accent);
    color: var(--color-bg);
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-to-main:focus {
    top: 0;
}

/* ===================================
   Contact Page Styles (Apple Style - Green Theme)
   =================================== */
.contact-section {
    padding: var(--spacing-3xl) 0;
    min-height: calc(100vh - 100px);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #000;
}

.contact-container {
    width: 100%;
    max-width: 700px;
    margin: 0 auto;
}

.contact-header {
    text-align: center;
    margin-bottom: 60px;
}

.contact-title {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 16px;
    color: #f5f5f7;
    letter-spacing: -0.02em;
}

.contact-subtitle {
    color: #86868b;
    font-size: 21px;
    max-width: 600px;
    margin: 0 auto;
    font-weight: 400;
    line-height: 1.4;
}

.contact-form-wrapper {
    background: #1d1d1f;
    border-radius: 20px;
    padding: 40px;
    border: 1px solid rgba(100, 255, 218, 0.1);
}

.form-group {
    margin-bottom: 24px;
    position: relative;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    color: #86868b;
    font-size: 14px;
    font-weight: 500;
    margin-left: 4px;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 16px;
    background-color: #2d2d2f;
    border: 1px solid transparent;
    border-radius: 12px;
    color: #f5f5f7;
    font-size: 17px;
    font-family: var(--font-family);
    transition: all 0.2s ease;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    background-color: #2d2d2f;
    box-shadow: 0 0 0 4px rgba(100, 255, 218, 0.2);
    border-color: var(--color-accent);
}

.form-textarea {
    resize: vertical;
    min-height: 160px;
}

.form-submit-btn {
    width: 100%;
    padding: 18px;
    background-color: transparent;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    font-size: 17px;
    font-weight: 600;
    border-radius: 980px;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 10px;
}

.form-submit-btn:hover {
    background-color: rgba(100, 255, 218, 0.1);
    transform: scale(1.02);
    box-shadow: 0 0 20px rgba(100, 255, 218, 0.2);
}

.back-link-wrapper {
    margin-bottom: 40px;
    text-align: left;
}

.back-link {
    display: inline-flex;
    align-items: center;
    color: #86868b;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease;
}

.back-link i {
    margin-right: 6px;
    font-size: 12px;
}

.back-link:hover {
    color: var(--color-accent);
    text-decoration: none;
}

/* Contact Methods Grid */
.contact-methods-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 50px;
}

.contact-method-card {
    background: #1d1d1f;
    border-radius: 18px;
    padding: 24px;
    text-align: center;
    text-decoration: none;
    color: #f5f5f7;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    border: 1px solid transparent;
}

.contact-method-card:hover {
    background: #2d2d2f;
    transform: scale(1.02);
    border-color: rgba(100, 255, 218, 0.3);
}

.contact-method-icon {
    font-size: 24px;
    color: var(--color-accent);
    margin-bottom: 12px;
}

.contact-method-text {
    font-size: 14px;
    font-weight: 500;
}

@media (max-width: 768px) {
    .contact-title {
        font-size: 40px;
    }

    .contact-methods-grid {
        grid-template-columns: 1fr;
    }

    .contact-form-wrapper {
        padding: 24px;
    }
}