/* ========================================
   THREAD. - Global Styles
   Minimal Modern Design System
   ======================================== */

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

:root {
    --white: #ffffff;
    --black: #0a0a0a;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;
    --accent: #1a1a1a;
    --accent-hover: #333333;
    --success: #22c55e;
    --error: #ef4444;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 50px -5px rgba(0, 0, 0, 0.12);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-800);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    outline: none;
    font-family: var(--font);
    transition: var(--transition);
}

input {
    font-family: var(--font);
    outline: none;
    border: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--gray-900);
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    text-align: center;
    margin-bottom: 48px;
    letter-spacing: -0.5px;
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    border-radius: var(--radius-md);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--black);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-outline {
    background: transparent;
    color: var(--black);
    border: 1.5px solid var(--black);
}

.btn-outline:hover {
    background: var(--black);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-small {
    padding: 10px 20px;
    font-size: 12px;
    background: var(--black);
    color: var(--white);
    border-radius: var(--radius-sm);
}

.btn-small:hover {
    background: var(--accent-hover);
}

.btn-full {
    width: 100%;
}

/* ========================================
   Navigation
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    border-bottom-color: var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -1px;
    color: var(--black);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-links a {
    font-size: 14px;
    font-weight: 400;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1.5px;
    background: var(--black);
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--black);
}

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

.cart-link {
    position: relative;
}

.cart-badge {
    position: absolute;
    top: -10px;
    right: -16px;
    background: var(--black);
    color: var(--white);
    font-size: 10px;
    font-weight: 600;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.cart-badge.bump {
    animation: cartBump 0.3s ease;
}

@keyframes cartBump {
    0% { transform: scale(1); }
    50% { transform: scale(1.4); }
    100% { transform: scale(1); }
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--black);
    transition: var(--transition);
    transform-origin: center;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: 64px 0 32px;
    margin-top: 80px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    font-size: 28px;
    font-weight: 700;
    color: var(--white);
    letter-spacing: -1px;
    margin-bottom: 12px;
}

.footer-col h4 {
    color: var(--white);
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.footer-col p {
    font-size: 14px;
    line-height: 1.7;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col ul li a {
    font-size: 14px;
    color: var(--gray-400);
}

.footer-col ul li a:hover {
    color: var(--white);
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    color: var(--gray-400);
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--white);
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
}

/* ========================================
   Scroll Animations
   ======================================== */

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.fade-in[data-delay="1"] { transition-delay: 0.1s; }
.fade-in[data-delay="2"] { transition-delay: 0.2s; }
.fade-in[data-delay="3"] { transition-delay: 0.3s; }
.fade-in[data-delay="4"] { transition-delay: 0.4s; }

/* ========================================
   Responsive - Global
   ======================================== */

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 32px 24px;
        gap: 24px;
        transform: translateY(-120%);
        transition: var(--transition-slow);
        border-bottom: 1px solid var(--gray-200);
    }

    .nav-links.open {
        transform: translateY(0);
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
}
/* ========================================
   THREAD. - GLOBAL VARIABLES
   Includes Light & Dark Themes
   ======================================== */

:root {
    /* Light Theme (Default) */
    --bg-body: #ffffff;
    --bg-nav: rgba(255, 255, 255, 0.95);
    --bg-footer: #0a0a0a;
    --text-main: #171717;
    --text-muted: #737373;
    --border-color: #e5e5e5;
    --btn-bg: #0a0a0a;
    --btn-text: #ffffff;
    --btn-hover: #333333;
    --card-bg: #fafafa;
    --accent: #1a1a1a;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* Dark Theme Override */
[data-theme="dark"] {
    --bg-body: #0f0f0f;
    --bg-nav: rgba(15, 15, 15, 0.95);
    --bg-footer: #1a1a1a;
    --text-main: #f5f5f5;
    --text-muted: #a3a3a3;
    --border-color: #333333;
    --btn-bg: #ffffff;
    --btn-text: #0a0a0a;
    --btn-hover: #d4d4d4;
    --card-bg: #171717;
    --accent: #e5e5e5;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    background-color: var(--bg-body);
    color: var(--text-main);
    transition: background-color 0.3s ease, color 0.3s ease;
}

body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-main);
    background: var(--bg-body);
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
}
/* ========================================
   DARK MODE - Global Overrides
   ======================================== */

/* Theme Toggle Button */
.nav-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-600);
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--gray-100);
    color: var(--gray-900);
}

.theme-icon {
    transition: var(--transition);
}

/* Dark Mode Variables */
[data-theme="dark"] {
    --white: #0f0f0f;
    --black: #f5f5f5;
    --gray-50: #1a1a1a;
    --gray-100: #222222;
    --gray-200: #333333;
    --gray-300: #444444;
    --gray-400: #888888;
    --gray-500: #a3a3a3;
    --gray-600: #cccccc;
    --gray-700: #d4d4d4;
    --gray-800: #e5e5e5;
    --gray-900: #f5f5f5;
    --accent: #e5e5e5;
    --accent-hover: #cccccc;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 50px -5px rgba(0, 0, 0, 0.6);
}

/* Body */
[data-theme="dark"] body {
    background: #0f0f0f;
    color: #e5e5e5;
    -webkit-font-smoothing: antialiased;
}

/* Navigation Dark */
[data-theme="dark"] .navbar {
    background: rgba(15, 15, 15, 0.95);
    backdrop-filter: blur(20px);
}

[data-theme="dark"] .navbar.scrolled {
    border-bottom-color: #2a2a2a;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .nav-logo {
    color: #f5f5f5;
}

[data-theme="dark"] .nav-links a {
    color: #a3a3a3;
}

[data-theme="dark"] .nav-links a:hover,
[data-theme="dark"] .nav-links a.active {
    color: #f5f5f5;
}

[data-theme="dark"] .nav-links a::after {
    background: #f5f5f5;
}

[data-theme="dark"] .nav-toggle span {
    background: #f5f5f5;
}

[data-theme="dark"] .cart-badge {
    background: #f5f5f5;
    color: #0f0f0f;
}

/* Theme Toggle in Dark */
[data-theme="dark"] .theme-toggle {
    color: #cccccc;
}

[data-theme="dark"] .theme-toggle:hover {
    background: #2a2a2a;
    color: #f5f5f5;
}

/* Buttons Dark */
[data-theme="dark"] .btn-primary {
    background: #f5f5f5;
    color: #0f0f0f;
}

[data-theme="dark"] .btn-primary:hover {
    background: #cccccc;
    color: #0f0f0f;
}

[data-theme="dark"] .btn-outline {
    color: #f5f5f5;
    border-color: #f5f5f5;
}

[data-theme="dark"] .btn-outline:hover {
    background: #f5f5f5;
    color: #0f0f0f;
}

[data-theme="dark"] .btn-small {
    background: #f5f5f5;
    color: #0f0f0f;
}

[data-theme="dark"] .btn-small:hover {
    background: #cccccc;
}

/* Headings Dark */
[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4 {
    color: #f5f5f5;
}

/* Footer Dark */
[data-theme="dark"] .footer {
    background: #0a0a0a;
    border-top: 1px solid #1a1a1a;
}

[data-theme="dark"] .footer-col p,
[data-theme="dark"] .footer-col ul li a {
    color: #888888;
}

[data-theme="dark"] .footer-col ul li a:hover {
    color: #f5f5f5;
}

[data-theme="dark"] .footer-bottom {
    border-top-color: #2a2a2a;
}

[data-theme="dark"] .social-links a {
    color: #888888;
}

[data-theme="dark"] .social-links a:hover {
    color: #f5f5f5;
}

/* Mobile Nav Dark */
[data-theme="dark"] .nav-links {
    background: rgba(15, 15, 15, 0.98);
    border-bottom-color: #2a2a2a;
}

@media (max-width: 768px) {
    [data-theme="dark"] .nav-links {
        background: rgba(15, 15, 15, 0.98);
    }
}