/**
 * Start Search - Stylesheet
 * Minimalist search engine homepage with dark mode support
 */

/* ============================================
   FONTS - LATO
   ============================================ */

@import url('fontlato.css');

/* ============================================
   CSS VARIABLES - DESIGN TOKENS
   ============================================ */

:root {
    /* Colors - Light Mode */
    --bg-primary: #d1d1d1;
    --bg-secondary: #f8f9fa;
    --bg-input: #ffffff;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --text-tertiary: #80868b;
    --accent: rgb(0, 153, 255); /* #1a73e8; */
    --accent-hover: rgb(0, 153, 255); /* #1557b0; */
    --border: #dfe1e5;
    --border-focus: rgb(0, 153, 255); /* #4285f4; */
    --shadow-color: rgba(32, 33, 36, 0.28);
    
    /* Logo Colors */
    --logo-gold: goldenrod; /* #FFD700; */
    --logo-text: #202124;
    --logo-cursor: #202124;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    
    /* Typography */
    --font-primary: 'Lato', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 20px;
    --font-size-xl: 80px;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 600;
    
    /* Effects */
    --shadow-sm: 0 1px 6px var(--shadow-color);
    --shadow-md: 0 2px 8px var(--shadow-color);
    --radius-sm: 8px;
    --radius-md: 24px;
    --radius-full: 999px;
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
}

/* Dark Mode - System Preference */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #202124;
        --bg-secondary: #292a2d;
        --bg-input: #303134;
        --text-primary: #e8eaed;
        --text-secondary: #9aa0a6;
        --text-tertiary: #5f6368;
        --accent: goldenrod; /* #8ab4f8; */
        --accent-hover: goldenrod; /* #aecbfa; */
        --border: #5f6368;
        --border-focus: gold; /* #8ab4f8; */
        --shadow-color: rgba(0, 0, 0, 0.3);
        
        /* Logo Colors - Dark Mode */
        --logo-text: #ffffff;
        --logo-cursor: #ffffff;
    }
}

/* Dark Mode - Manual Override */
[data-theme="dark"] {
    --bg-primary: #202124;
    --bg-secondary: #292a2d;
    --bg-input: #303134;
    --text-primary: #e8eaed;
    --text-secondary: #9aa0a6;
    --text-tertiary: #5f6368;
    --accent: goldenrod; /* #8ab4f8; */
    --accent-hover: goldenrod; /* #aecbfa; */
    --border: #5f6368;
    --border-focus: gold; /* #8ab4f8; */
    --shadow-color: rgba(0, 0, 0, 0.3);
    
    /* Logo Colors - Dark Mode */
    --logo-text: #ffffff;
    --logo-cursor: #ffffff;
}

[data-theme="light"] {
    --bg-primary:  #e9e9e9;
    --bg-secondary: #f8f9fa;
    --bg-input: #ffffff;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --text-tertiary: #80868b;
    --accent: rgb(73, 182, 255); /* #1a73e8; */
    --accent-hover: rgb(0, 153, 255); /* #1557b0; */
    --border: #d1d1d1;
    --border-focus: rgb(0, 153, 255); /* #4285f4; */
    --shadow-color: rgba(32, 33, 36, 0.28);
    
    /* Logo Colors - Light Mode */
    --logo-text: #202124;
    --logo-cursor: #202124;
}

/* ============================================
   BASE STYLES
   ============================================ */

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

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    display: flex;
    min-height: 100vh;
    transition: background-color var(--transition-base), color var(--transition-base);
}

main {
    margin: auto;
    width: 100%;
    max-width: 600px;
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-2xl);
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================
   HEADER & LOGO YONIX_
   ============================================ */

.header {
    text-align: center;
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--space-sm);
}

/* Logo Components */
.gold {
    color: var(--logo-gold);
}

.text {
    color: var(--logo-text);
    transition: color var(--transition-base);
}

.cursor {
    color: var(--logo-cursor);
    animation: blink 1s infinite;
    transition: color var(--transition-base);
}

/* Cursor Blink Animation */
@keyframes blink {
    0%, 49% {
        opacity: 1;
    }
    50%, 100% {
        opacity: 0;
    }
}

.tagline {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: var(--font-weight-normal);
}

/* ============================================
   SEARCH CONTAINER
   ============================================ */

.search-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

/* Search Form */
.search-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    background-color: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.search-wrapper:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--border-focus);
}

.search-wrapper:focus-within {
    box-shadow: var(--shadow-md);
    border-color: var(--border-focus);
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.search-icon {
    color: var(--text-tertiary);
    flex-shrink: 0;
    margin-right: var(--space-md);
}

.search-input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: var(--font-size-base);
    color: var(--text-primary);
    outline: none;
    font-family: var(--font-primary);
}

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

.search-button {
    background: transparent;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: var(--space-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    margin-left: var(--space-sm);
}

.search-button:hover {
    background-color: var(--bg-secondary);
    color: var(--accent);
}

.search-button:active {
    transform: scale(0.95);
}

/* ============================================
   ENGINE SELECTOR
   ============================================ */

.engine-selector {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.engine-option {
    cursor: pointer;
    display: flex;
    align-items: center;
}

.engine-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.engine-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    background-color: transparent;
    border: 1px solid transparent;
    transition: all var(--transition-fast);
    user-select: none;
}

.engine-icon {
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.engine-option:hover .engine-label {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.engine-option input[type="radio"]:checked + .engine-label {
    background-color: var(--accent);
    color: black; /* #ffffff; */
    border-color: var(--accent);
}

.engine-option input[type="radio"]:checked + .engine-label .engine-icon {
    color: rgb(0, 255, 0); /* #ffffff; */
}

.engine-option input[type="radio"]:focus + .engine-label {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border);
}

.credits {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

/* Theme Toggle Button */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    width: 40px;
    height: 40px;
}

.theme-toggle:hover {
    background-color: var(--bg-secondary);
    border-color: var(--accent);
    color: var(--accent);
}

.theme-toggle:active {
    transform: scale(0.95);
}

.theme-toggle:focus {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.sun-icon,
.moon-icon {
    position: absolute;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.moon-icon {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: rotate(-90deg);
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: rotate(0deg);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .sun-icon {
        opacity: 0;
        transform: rotate(-90deg);
    }
    
    :root:not([data-theme="light"]) .moon-icon {
        opacity: 1;
        transform: rotate(0deg);
    }
}

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

@media (max-width: 768px) {
    main {
        padding: var(--space-md);
        gap: var(--space-xl);
    }
    
    .logo {
        font-size: 60px;
    }
    
    .search-wrapper {
        padding: var(--space-sm) var(--space-md);
    }
    
    .engine-selector {
        gap: var(--space-sm);
    }
    
    .engine-label {
        padding: var(--space-xs) var(--space-sm);
        font-size: 13px;
    }
    
    .footer {
        flex-direction: column-reverse;
        gap: var(--space-md);
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 60px;
    }
    
    .search-input {
        font-size: var(--font-size-sm);
    }
}