/*
 * runningmate COMPONENT LIBRARY
 * A minimal, cohesive design system
 *
 * Table of Contents:
 * 1. CSS Variables (Theme)
 * 2. Base Reset
 * 3. Typography
 * 4. Layout
 * 5. Navigation
 * 6. Buttons
 * 7. Form Elements
 * 8. Cards
 * 9. Modals
 * 10. Feedback
 * 11. Footer
 * 12. Utilities
 */

/* ===========================================
   1. CSS VARIABLES (THEME)
   =========================================== */

:root {
    /* Colors - Light Mode */
    --color-bg: #FFFBF5;
    --color-bg-card: #FFFFFF;
    --color-bg-input: #F8F6F3;
    --color-bg-hover: #F0EDE8;

    --color-text: #1A1A1A;
    --color-text-secondary: #6B6B6B;
    --color-text-dim: #9A9A9A;

    --color-accent: #FF4D4D;
    --color-accent-hover: #E63E3E;
    --color-accent-dim: rgba(255, 77, 77, 0.1);

    --color-success: #00D9A5;
    --color-success-dim: rgba(0, 217, 165, 0.15);

    --color-error: #DC2626;
    --color-error-dim: rgba(220, 38, 38, 0.15);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-focus: 0 0 0 2px var(--color-accent-dim);

    /* Typography */
    --font-display: 'Bebas Neue', sans-serif;
    --font-body: 'Plus Jakarta Sans', system-ui, sans-serif;

    /* Sizing */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 100px;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
    --transition-slow: 0.3s ease;
}

[data-theme="dark"] {
    --color-bg: #0A0A0B;
    --color-bg-card: #141416;
    --color-bg-input: #1C1C1F;
    --color-bg-hover: #2A2A2E;

    --color-text: #FAFAFA;
    --color-text-secondary: #A0A0A0;
    --color-text-dim: #666666;

    --color-accent: #FF6B6B;
    --color-accent-hover: #FF5252;
    --color-accent-dim: rgba(255, 107, 107, 0.15);

    --color-success: #00D9A5;
    --color-success-dim: rgba(0, 217, 165, 0.2);

    --color-error: #EF4444;
    --color-error-dim: rgba(239, 68, 68, 0.2);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
}

/* ===========================================
   2. BASE RESET
   =========================================== */

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

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

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Subtle texture overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    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: 0.02;
    pointer-events: none;
    z-index: 0;
}

/* ===========================================
   3. TYPOGRAPHY
   =========================================== */

/* Display headings - Bebas Neue */
.heading-xl {
    font-family: var(--font-display);
    font-size: clamp(48px, 8vw, 96px);
    line-height: 0.95;
    letter-spacing: -0.01em;
    color: var(--color-text);
}

.heading-lg {
    font-family: var(--font-display);
    font-size: clamp(36px, 5vw, 48px);
    line-height: 1;
    letter-spacing: 0.02em;
    color: var(--color-text);
}

.heading-md {
    font-family: var(--font-display);
    font-size: 32px;
    line-height: 1;
    letter-spacing: 0.02em;
    color: var(--color-text);
}

.heading-sm {
    font-family: var(--font-display);
    font-size: 24px;
    line-height: 1;
    letter-spacing: 0.02em;
    color: var(--color-text);
}

/* Body text - Plus Jakarta Sans */
.text-lg {
    font-size: 18px;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

.text-md {
    font-size: 15px;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

.text-sm {
    font-size: 14px;
    line-height: 1.5;
    color: var(--color-text-secondary);
}

.text-xs {
    font-size: 12px;
    line-height: 1.4;
    color: var(--color-text-dim);
}

/* Labels */
.label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-text-dim);
    margin-bottom: var(--space-sm);
}

/* Text colors */
.text-accent { color: var(--color-accent); }
.text-dim { color: var(--color-text-dim); }
.text-secondary { color: var(--color-text-secondary); }

/* ===========================================
   4. LAYOUT
   =========================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.container-sm {
    max-width: 480px;
}

.container-md {
    max-width: 720px;
}

.container-lg {
    max-width: 900px;
}

/* Flex utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-center { align-items: center; justify-content: center; }
.flex-between { justify-content: space-between; }
.flex-start { align-items: flex-start; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

/* Grid */
.grid {
    display: grid;
    gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

/* ===========================================
   5. NAVIGATION
   =========================================== */

/* Top navigation bar */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-xl);
    background: transparent;
    z-index: 100;
}

.nav--solid {
    background: var(--color-bg);
}

.nav--sticky {
    position: sticky;
}

/* Logo */
.logo {
    font-family: var(--font-display);
    font-size: 28px;
    letter-spacing: 0.02em;
    color: var(--color-text);
    text-decoration: none;
}

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

/* Nav group */
.nav-group {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

/* Nav link */
.nav-link {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-normal);
}

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

/* Header (for internal pages) */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 clamp(24px, 4vw, 48px);
    background: transparent;
    z-index: 100;
}

.header.sticky {
    position: sticky;
    background: var(--color-bg);
}

/* ===========================================
   6. BUTTONS
   =========================================== */

/* Base button */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 14px 28px;
    font-family: var(--font-body);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-normal);
}

/* Primary button */
.btn-primary {
    background: var(--color-accent);
    color: white;
}

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

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

/* Secondary button */
.btn-secondary {
    background: var(--color-text);
    color: var(--color-bg);
}

.btn-secondary:hover {
    transform: translateY(-2px);
}

/* Ghost button */
.btn-ghost {
    background: var(--color-bg-input);
    color: var(--color-text);
}

.btn-ghost:hover {
    background: var(--color-bg-hover);
}

/* Icon button */
.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 50%;
    color: var(--color-text-dim);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-normal);
}

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

.btn-icon--bg {
    background: var(--color-bg-input);
    border-radius: var(--radius-sm);
}

.btn-icon--bg:hover {
    background: var(--color-text);
    color: var(--color-bg);
}

/* Small button */
.btn-sm {
    padding: 10px 20px;
    font-size: 13px;
}

/* Large button */
.btn-lg {
    padding: 18px 36px;
    font-size: 16px;
}

/* Full width */
.btn-block {
    width: 100%;
}

/* Theme toggle */
.theme-toggle {
    width: 32px;
    height: 32px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: 50%;
    color: var(--color-text-dim);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-normal);
}

.theme-toggle:hover {
    color: var(--color-text);
}

.theme-icon {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: 1.5px solid currentColor;
    position: relative;
    transition: all var(--transition-normal);
}

.theme-icon::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-bg);
    transform: scale(0);
    transition: transform var(--transition-normal);
}

[data-theme="dark"] .theme-icon::before {
    transform: scale(1);
}

/* ===========================================
   7. FORM ELEMENTS
   =========================================== */

/* Input base */
.input {
    width: 100%;
    padding: 14px 16px;
    background: var(--color-bg-input);
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 15px;
    transition: box-shadow var(--transition-normal);
}

.input:focus {
    outline: none;
    box-shadow: var(--shadow-focus);
}

.input::placeholder {
    color: var(--color-text-dim);
}

/* Time input group */
.input-time-group {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 12px 16px;
    background: var(--color-bg-input);
    border-radius: var(--radius-md);
}

.input-time {
    width: 44px;
    padding: 6px 2px;
    background: var(--color-bg-card);
    border: none;
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: var(--font-display);
    font-size: 24px;
    text-align: center;
    -moz-appearance: textfield;
    appearance: textfield;
}

.input-time::-webkit-outer-spin-button,
.input-time::-webkit-inner-spin-button {
    -webkit-appearance: none;
    appearance: none;
}

.input-time:focus {
    outline: none;
    box-shadow: var(--shadow-focus);
}

.input-time-sep {
    color: var(--color-text-dim);
    font-family: var(--font-display);
    font-size: 24px;
}

.input-time-labels {
    margin-left: auto;
    display: flex;
    gap: 28px;
}

.input-time-label {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-dim);
}

/* Pills / Segmented control */
.pills {
    display: flex;
    gap: var(--space-sm);
}

.pill {
    flex: 1;
    padding: 14px 8px;
    background: var(--color-bg-input);
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-family: var(--font-body);
    font-size: 14px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.pill:hover {
    background: var(--color-bg-hover);
    color: var(--color-text);
}

.pill.selected,
.pill.active,
.pill[aria-selected="true"] {
    background: var(--color-text);
    color: var(--color-bg);
}

/* Toggle switch */
.toggle-row {
    display: flex;
    align-items: center;
    gap: 14px;
    cursor: pointer;
    padding: 6px 0;
}

.toggle {
    width: 44px;
    height: 24px;
    background: var(--color-bg-hover);
    border-radius: 12px;
    position: relative;
    transition: all 0.25s ease;
    flex-shrink: 0;
}

.toggle::after {
    content: '';
    position: absolute;
    width: 18px;
    height: 18px;
    background: white;
    border-radius: 50%;
    top: 3px;
    left: 3px;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 3px rgba(0,0,0,0.15);
}

.toggle.active {
    background: var(--color-accent);
}

.toggle.active::after {
    transform: translateX(20px);
}

.toggle-text {
    font-size: 14px;
    color: var(--color-text-secondary);
    transition: color var(--transition-normal);
}

.toggle-row:hover .toggle-text {
    color: var(--color-text);
}

/* ===========================================
   8. CARDS
   =========================================== */

/* Base card */
.card {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-lg {
    padding: var(--space-xl);
}

.card-interactive {
    transition: all var(--transition-normal);
    cursor: pointer;
}

.card-interactive:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Plan card */
.plan-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    position: relative;
}

.plan-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}


.plan-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-md);
}

.plan-card-title {
    font-family: var(--font-display);
    font-size: 36px;
    line-height: 1;
    color: var(--color-text);
}

.plan-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-lg);
}

/* ===========================================
   9. MODALS
   =========================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--color-bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    max-width: 400px;
    width: 90%;
    transform: scale(0.95);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-icon {
    width: 56px;
    height: 56px;
    background: var(--color-accent-dim);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-lg);
}

.modal-icon svg {
    width: 28px;
    height: 28px;
    color: var(--color-accent);
}

.modal-title {
    font-family: var(--font-display);
    font-size: 24px;
    text-align: center;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.modal-text {
    font-size: 14px;
    color: var(--color-text-secondary);
    text-align: center;
    line-height: 1.5;
    margin-bottom: var(--space-lg);
}

.modal-actions {
    display: flex;
    gap: var(--space-md);
}

/* ===========================================
   10. FEEDBACK
   =========================================== */

/* Alert / Message */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-md);
    font-size: 14px;
}

.alert-error {
    background: var(--color-error-dim);
    color: var(--color-error);
}

.alert-success {
    background: var(--color-success-dim);
    color: var(--color-success);
}

.alert-accent {
    background: var(--color-accent-dim);
    color: var(--color-text-secondary);
}

/* Badge */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Spinner */
.spinner {
    width: 64px;
    height: 64px;
    border: 3px solid transparent;
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 24px;
    height: 24px;
    border-width: 2px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===========================================
   11. FOOTER
   =========================================== */

.footer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    padding: var(--space-lg) var(--space-xl);
}

.footer-link {
    font-size: 12px;
    color: var(--color-text-dim);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.footer-link:hover {
    color: var(--color-text-secondary);
}

.footer-sep {
    width: 3px;
    height: 3px;
    background: var(--color-bg-hover);
    border-radius: 50%;
}

/* ===========================================
   12. UTILITIES
   =========================================== */

/* Visibility */
.hidden { display: none !important; }
.invisible { visibility: hidden; }

/* Text alignment */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Spacing */
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* Z-index scale */
.z-0 { z-index: 0; }
.z-10 { z-index: 10; }
.z-50 { z-index: 50; }
.z-100 { z-index: 100; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

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

@keyframes slideUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fadeIn {
    animation: fadeIn var(--transition-normal) ease forwards;
}

.animate-slideUp {
    animation: slideUp var(--transition-normal) ease forwards;
}

/* ===========================================
   RESPONSIVE
   =========================================== */

@media (max-width: 768px) {
    :root {
        --space-xl: 24px;
        --space-2xl: 32px;
    }

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

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

    .grid-2,
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .heading-xl {
        font-size: clamp(36px, 10vw, 48px);
    }

    .pills {
        flex-wrap: wrap;
    }

    .pill {
        flex: 1 1 calc(33.33% - 6px);
        min-width: 0;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 24px;
    }

    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }

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

    .modal {
        padding: var(--space-lg);
    }
}