/* ============================================
   PORTFOLIO — BASE DESIGN SYSTEM
   Warm Earthy Theme + Hexagonal Accents
   ============================================ */

/* --- Custom Properties --- */
:root {
    /* Core Palette */
    --bg-main: #FAF8F5;
    --bg-card: #E4D5C7;
    --bg-card-alpha: rgba(228, 213, 199, 0.55);
    --bg-card-hover: rgba(228, 213, 199, 0.8);
    --accent: #A15C38;
    --accent-hover: #8B4E2E;
    --accent-light: rgba(161, 92, 56, 0.1);
    --accent-lighter: rgba(161, 92, 56, 0.05);
    --text-dark: #3E2723;
    --text-body: #5D4037;
    --text-muted: #8D6E63;
    --text-light: #BCAAA4;

    /* Extended Palette */
    --terminal-bg: #2C1810;
    --terminal-text: #E4D5C7;
    --terminal-accent: #D4915A;
    --terminal-cursor: #A15C38;
    --card-border: rgba(161, 92, 56, 0.1);
    --card-border-hover: rgba(161, 92, 56, 0.25);
    --card-shadow: rgba(62, 39, 35, 0.06);
    --card-shadow-hover: rgba(62, 39, 35, 0.12);

    /* Hex-specific (for hexagonal decorations) */
    --hex-bg: rgba(161, 92, 56, 0.08);
    --hex-border: rgba(161, 92, 56, 0.15);

    /* Typography */
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-section: 7rem;

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 3px var(--card-shadow);
    --shadow-md: 0 4px 14px var(--card-shadow);
    --shadow-lg: 0 8px 28px var(--card-shadow);
    --shadow-hover: 0 12px 36px var(--card-shadow-hover);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 600ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Layout */
    --max-width: 1140px;
    --nav-height: 72px;
}

/* --- Dark Theme (warm dark) --- */
[data-theme="dark"] {
    --bg-main: #1A120B;
    --bg-card: #2C1810;
    --bg-card-alpha: rgba(44, 24, 16, 0.65);
    --bg-card-hover: rgba(44, 24, 16, 0.85);
    --accent: #C4784A;
    --accent-hover: #D4915A;
    --accent-light: rgba(196, 120, 74, 0.12);
    --accent-lighter: rgba(196, 120, 74, 0.06);
    --text-dark: #FAF8F5;
    --text-body: #E4D5C7;
    --text-muted: #BCAAA4;
    --text-light: #8D6E63;

    --terminal-bg: #0D0907;
    --terminal-text: #E4D5C7;
    --terminal-accent: #D4915A;
    --card-border: rgba(196, 120, 74, 0.12);
    --card-border-hover: rgba(196, 120, 74, 0.25);
    --card-shadow: rgba(0, 0, 0, 0.2);
    --card-shadow-hover: rgba(0, 0, 0, 0.35);

    --hex-bg: rgba(196, 120, 74, 0.1);
    --hex-border: rgba(196, 120, 74, 0.2);
}

/* --- Preloader --- */
.preloader {
    position: fixed;
    inset: 0;
    background: var(--bg-main);
    z-index: 99999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.preloader.loaded {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.preloader-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.preloader-hex {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: white;
    animation: preloaderPulse 1.2s ease-in-out infinite;
}

@keyframes preloaderPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.08); opacity: 0.7; }
}

.preloader-bar {
    width: 120px;
    height: 3px;
    background: rgba(161, 92, 56, 0.15);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.preloader-bar-fill {
    height: 100%;
    background: var(--accent);
    border-radius: var(--radius-full);
    animation: preloaderFill 1.5s ease-in-out forwards;
}

@keyframes preloaderFill {
    0% { width: 0; }
    100% { width: 100%; }
}


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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-main);
    color: var(--text-body);
    line-height: 1.7;
    overflow-x: hidden;
    min-height: 100vh;
    cursor: default;
}

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

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

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

ul, ol { list-style: none; }

button {
    cursor: pointer;
    border: none;
    background: none;
    font-family: inherit;
    color: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

::selection {
    background: rgba(161, 92, 56, 0.2);
    color: var(--text-dark);
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-main); }
::-webkit-scrollbar-thumb {
    background: rgba(161, 92, 56, 0.25);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(161, 92, 56, 0.4);
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-dark);
}

h1 { font-size: clamp(2.2rem, 4.5vw, 3.5rem); letter-spacing: -0.03em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); letter-spacing: -0.02em; }
h3 { font-size: clamp(1.1rem, 2vw, 1.35rem); letter-spacing: -0.01em; }

p {
    color: var(--text-body);
    font-size: 1rem;
    line-height: 1.8;
}

/* --- Layout --- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    position: relative;
    z-index: 1;
}

.section {
    padding: var(--space-section) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.section-header h2 { margin-bottom: var(--space-sm); }
.section-header p {
    max-width: 550px;
    margin: 0 auto;
    font-size: 1.05rem;
    color: var(--text-muted);
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--accent);
    margin-bottom: var(--space-md);
    padding: 6px 16px;
    background: var(--accent-light);
    border: 1px solid rgba(161, 92, 56, 0.15);
    border-radius: var(--radius-full);
}

.section-label::before {
    content: '>';
    font-weight: 700;
}

/* --- Glass Card (warm) --- */
.glass-card {
    background: var(--bg-card-alpha);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.glass-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--card-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover), 0 0 30px rgba(161, 92, 56, 0.06);
}

.glass-card:hover::after {
    background: linear-gradient(90deg, transparent, rgba(161, 92, 56, 0.3), transparent);
}

/* subtle top reflection */
.glass-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 15%;
    right: 15%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(161, 92, 56, 0.15), transparent);
    pointer-events: none;
}

/* --- Hexagonal Icon Box --- */
.hex-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--hex-bg);
    border: 1.5px solid var(--hex-border);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    font-size: 1.1rem;
    color: var(--accent);
    transition: all var(--transition-base);
    flex-shrink: 0;
}

.glass-card:hover .hex-icon {
    background: rgba(161, 92, 56, 0.15);
    color: var(--accent-hover);
}

/* --- Animations / Keyframes --- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

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

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes glitch {
    0%, 100% { transform: translate(0); }
    20% { transform: translate(-2px, 1px); }
    40% { transform: translate(2px, -1px); }
    60% { transform: translate(-1px, -1px); }
    80% { transform: translate(1px, 1px); }
}

@keyframes typewriter-cursor {
    0%, 100% { border-color: var(--terminal-accent); }
    50% { border-color: transparent; }
}

@keyframes countUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* --- Reveal --- */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }
.reveal-delay-5 { transition-delay: 500ms; }
.reveal-delay-6 { transition-delay: 600ms; }

/* --- Glitch text effect --- */
.glitch-text {
    position: relative;
}

.glitch-text.active {
    animation: glitch 0.3s ease;
}

/* --- Page content --- */
.page-content {
    animation: fadeIn 0.4s ease;
}

/* --- Scroll Progress Bar --- */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: var(--accent);
    z-index: 10001;
    width: 0;
    transition: width 0.05s linear;
    box-shadow: 0 0 8px rgba(161, 92, 56, 0.4);
}

/* --- Section Separator (hex pattern) --- */
.section-separator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: var(--space-lg) 0;
    position: relative;
    z-index: 1;
}

.section-separator::before,
.section-separator::after {
    content: '';
    flex: 1;
    max-width: 180px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--card-border-hover), transparent);
}

.separator-hex {
    width: 10px;
    height: 10px;
    background: var(--accent);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    opacity: 0.4;
}

.separator-hex:nth-child(3) {
    width: 14px;
    height: 14px;
    opacity: 0.7;
}

/* --- Typed subtitle cursor --- */
.typed-cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background: var(--accent);
    margin-left: 3px;
    vertical-align: text-bottom;
    animation: blink 0.8s step-end infinite;
}

/* --- Theme transition --- */
body,
.nav,
.glass-card,
.terminal,
.footer {
    transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
}