/* ================================================
   TIME CALCULATOR WELCOME - Editorial Craft Design
   ================================================ */

/* CSS Variables - Shared Design System */
:root {
    /* Colors */
    --color-bg: #0f0f23;
    --color-bg-elevated: #16162d;
    --color-surface: #1e1e3a;
    --color-cream: #faf8f5;
    --color-cream-muted: #e8e6e1;
    --color-accent: #e8ff47;
    --color-accent-hover: #d4eb3a;
    --color-text: #faf8f5;
    --color-text-muted: #a0a0b8;
    --color-border: rgba(255, 255, 255, 0.08);

    /* Typography */
    --font-display: 'Sora', sans-serif;
    --font-body: 'DM Sans', sans-serif;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-2xl: 6rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 32px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Noise Texture Overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
    z-index: 1000;
}

/* ================================================
   NAVIGATION
   ================================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-sm) 0;
    transition: var(--transition-base);
}

.navbar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--color-bg);
    opacity: 0;
    transition: var(--transition-base);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled::before {
    opacity: 0.95;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom-color: var(--color-border);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 1;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: var(--transition-fast);
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-xs);
    align-items: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-decoration: none;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    cursor: pointer;
}

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

/* Dropdown */
.dropdown-toggle::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 5px solid currentColor;
    opacity: 0.6;
    transition: var(--transition-fast);
}

.nav-dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    min-width: 200px;
    padding: var(--space-xs);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    list-style: none;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: 12px 16px;
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.dropdown-menu li a:hover,
.dropdown-menu li a.active {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.05);
}

/* ================================================
   LAYOUT
   ================================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    padding-top: 70px;
}

/* ================================================
   WELCOME HEADER (Compact)
   ================================================ */
.welcome-header {
    text-align: center;
    padding: var(--space-sm) 0 var(--space-md);
}

.welcome-header .title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin: 0;
}

/* ================================================
   MAIN CONTENT
   ================================================ */
.main {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-lg) var(--space-xl);
    margin-bottom: var(--space-lg);
    position: relative;
    overflow: hidden;
}

/* Subtle glow effect */
.main::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(232, 255, 71, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

/* ================================================
   INSTRUCTIONS
   ================================================ */
.instructions {
    margin-bottom: var(--space-xl);
}

.instruction-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-md);
    transition: var(--transition-base);
}

.instruction-card:hover {
    border-color: rgba(255, 255, 255, 0.12);
    transform: translateY(-2px);
}

.step-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
}

.step-number {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    background: var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-bg);
}

.step-text h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
    letter-spacing: -0.01em;
}

.step-text p {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.step-image {
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    text-align: center;
}

.step-image img {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5);
}

/* ================================================
   FEATURES SECTION
   ================================================ */
.features {
    margin-bottom: var(--space-xl);
}

.features h2 {
    font-family: var(--font-display);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    text-align: center;
    margin-bottom: var(--space-lg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
}

.feature-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    text-align: center;
    transition: var(--transition-base);
}

.feature-item:hover {
    border-color: rgba(255, 255, 255, 0.12);
    transform: translateY(-2px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #a3e635 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-bg);
    margin: 0 auto var(--space-sm);
}

.feature-item h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
    letter-spacing: -0.01em;
}

.feature-item p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}

/* ================================================
   CTA SECTION
   ================================================ */
.cta-section {
    text-align: center;
    padding: var(--space-lg);
    background: linear-gradient(135deg, var(--color-accent) 0%, #a3e635 100%);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.1;
    pointer-events: none;
}

.cta-section p {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-bg);
    margin-bottom: var(--space-xs);
    position: relative;
}

.cta-hint {
    font-family: var(--font-body) !important;
    font-size: 0.9rem !important;
    font-weight: 500 !important;
    color: rgba(15, 15, 35, 0.7) !important;
}

/* ================================================
   FOOTER
   ================================================ */
.footer {
    padding: var(--space-lg) 0;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

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

.footer-nav {
    display: flex;
    gap: var(--space-md);
}

.footer-nav a {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: var(--transition-fast);
}

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

.footer-nav a.active {
    color: var(--color-accent);
}

/* ================================================
   RESPONSIVE DESIGN
   ================================================ */
@media (max-width: 768px) {
    :root {
        --space-lg: 1.5rem;
        --space-xl: 2.5rem;
    }

    .container {
        padding: 0 var(--space-sm);
        padding-top: 80px;
    }

    .nav-container {
        padding: 0 var(--space-sm);
    }

    .main {
        padding: var(--space-lg);
        border-radius: var(--radius-lg);
    }

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

    .logo-text {
        font-size: 1.5rem;
    }

    .logo-icon {
        width: 48px;
        height: 48px;
    }
}

@media (max-width: 480px) {
    .nav-menu {
        gap: 0;
    }

    .nav-link {
        padding: 8px 12px;
        font-size: 0.85rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .step-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .step-number {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .instruction-card {
        padding: var(--space-md);
    }
}

/* ================================================
   ANIMATIONS
   ================================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header {
    animation: fadeInUp 0.6s ease-out;
}

.main {
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.instruction-card {
    animation: fadeInUp 0.5s ease-out both;
}

.instruction-card:nth-child(1) { animation-delay: 0.2s; }
.instruction-card:nth-child(2) { animation-delay: 0.3s; }

.feature-item {
    animation: fadeInUp 0.4s ease-out both;
}

.feature-item:nth-child(1) { animation-delay: 0.3s; }
.feature-item:nth-child(2) { animation-delay: 0.35s; }
.feature-item:nth-child(3) { animation-delay: 0.4s; }
.feature-item:nth-child(4) { animation-delay: 0.45s; }