/**
 * OKEEI Suite - Common Styles
 * Shared base styles across all tools
 * Version: 2.0
 */

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

/* ========== CSS VARIABLES ========== */
:root {
    /* Dark Theme (Default) */
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-tertiary: #1a1a1a;
    --bg-hover: #2a2a2a;
    --text-primary: #e0e0e0;
    --text-secondary: #888888;
    --border-color: #333333;
    --accent-color: #e06c75;
    --accent-hover: #c75a63;
    --accent-purple: #6200ea;
    --accent-purple-light: #7c4dff;
    --error-color: #cf6679;
    --success-color: #4ade80;
    --warning-color: #fbbf24;

    /* Legacy mappings for backward compatibility */
    --bg-color: var(--bg-primary);
    --bg-panel: var(--bg-secondary);
    --text-color: var(--text-primary);
    --accent-primary: var(--accent-purple);
    --accent-secondary: var(--accent-purple-light);
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e8e8e8;
    --bg-hover: #eeeeee;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --border-color: #d0d0d0;
    --accent-color: #e06c75;
    --accent-hover: #c75a63;
    --success-color: #22c55e;
    --error-color: #ef4444;

    /* Legacy mappings */
    --bg-color: var(--bg-primary);
    --bg-panel: var(--bg-secondary);
    --text-color: var(--text-primary);
}

/* ========== BASE BODY ========== */
body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.5;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* ========== TYPOGRAPHY ========== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: opacity 0.2s;
}

a:hover {
    opacity: 0.8;
}

/* Font Classes */
.font-display {
    font-family: 'Unbounded', sans-serif;
}

.font-mono {
    font-family: 'Space Grotesk', monospace;
}

.font-label {
    font-family: 'Work Sans', sans-serif;
}

/* ========== SHARED HEADER (Variant 8 - Minimal Line) ========== */
.okeei-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 64px;
    width: 100%;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease, border-color 0.3s ease;
    flex-shrink: 0;
}

.okeei-header .header-left {
    display: flex;
    align-items: center;
    gap: 32px;
}

.okeei-header .home-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-family: 'Work Sans', sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    transition: color 0.2s;
}

.okeei-header .home-link:hover {
    color: var(--accent-color);
}

.okeei-header .home-link i {
    font-size: 1.1rem;
}

.okeei-header .logo {
    font-family: 'Unbounded', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 0.5px;
}

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

.okeei-header .header-right {
    display: flex;
    align-items: center;
    gap: 32px;
}

.okeei-header .datetime {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.okeei-header .datetime .date-text {
    color: var(--text-secondary);
}

.okeei-header .datetime .separator {
    color: var(--border-color);
}

.okeei-header .datetime .time-text {
    color: var(--text-primary);
    font-weight: 500;
}

.okeei-header .theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s;
    font-size: 1.2rem;
}

.okeei-header .theme-toggle:hover {
    color: var(--warning-color);
}

/* Theme icon visibility */
.okeei-header .theme-toggle .icon-sun {
    display: none;
}

.okeei-header .theme-toggle .icon-moon {
    display: block;
}

[data-theme="light"] .okeei-header .theme-toggle .icon-sun {
    display: block;
}

[data-theme="light"] .okeei-header .theme-toggle .icon-moon {
    display: none;
}

/* ========== SHARED FOOTER ========== */
.okeei-footer {
    padding: 24px;
    text-align: center;
    color: var(--text-secondary);
    font-family: 'DM Sans', sans-serif;
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
    width: 100%;
    background: var(--bg-primary);
    flex-shrink: 0;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.okeei-footer a {
    color: var(--accent-color);
    font-weight: 600;
    transition: opacity 0.2s;
}

.okeei-footer a:hover {
    opacity: 0.8;
}

/* Legacy footer class support */
.footer {
    margin-top: 50px;
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-family: 'DM Sans', sans-serif;
    text-align: center;
    line-height: 1.8;
}

.footer a {
    color: var(--accent-color);
    font-weight: 600;
}

/* ========== PAGE WRAPPER ========== */
.okeei-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    width: 100%;
}

.okeei-content {
    flex: 1;
    padding: 40px 20px;
    width: 100%;
}

/* ========== UTILITY CLASSES ========== */
.hidden { display: none !important; }
.text-center { text-align: center; }
.text-secondary { color: var(--text-secondary); }

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-2px);
    filter: brightness(1.1);
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--accent-purple) 0%, var(--accent-purple-light) 100%);
    color: white;
}

.btn-primary:hover {
    box-shadow: 0 5px 20px rgba(98, 0, 234, 0.4);
}

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

.btn-accent:hover {
    background: var(--accent-hover);
    box-shadow: 0 5px 20px rgba(224, 108, 117, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-outline:hover {
    background: var(--bg-hover);
    border-color: var(--accent-color);
}

.btn-success {
    background-color: var(--success-color);
    color: #052e16;
}

.btn-danger {
    background: transparent;
    color: var(--error-color);
    border: 1px solid var(--error-color);
}

.btn-danger:hover {
    background: var(--error-color);
    color: white;
}

/* ========== FORM ELEMENTS ========== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-family: 'Work Sans', sans-serif;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'DM Sans', sans-serif;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(224, 108, 117, 0.2);
}

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

/* ========== PANELS / CARDS ========== */
.panel {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

[data-theme="light"] .panel {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* ========== ANIMATIONS ========== */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-5px); }
    40%, 80% { transform: translateX(5px); }
}

.shake { animation: shake 0.5s ease; }

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

.fade-in { animation: fadeIn 0.3s ease; }

/* ========== TOAST / STATUS MESSAGES ========== */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 30px;
    font-size: 14px;
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
    z-index: 1000;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.toast.show {
    opacity: 1;
}

/* ========== SCROLLBAR (Webkit) ========== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #444;
}

[data-theme="light"] ::-webkit-scrollbar-thumb:hover {
    background: #999;
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) var(--bg-primary);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .okeei-header {
        padding: 0 16px;
        height: 56px;
    }

    .okeei-header .header-left {
        gap: 16px;
    }

    .okeei-header .header-right {
        gap: 16px;
    }

    .okeei-header .home-link span {
        display: none;
    }

    .okeei-header .datetime .date-text {
        display: none;
    }

    .okeei-header .datetime .separator {
        display: none;
    }

    .btn {
        padding: 10px 16px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 14px;
    }
    
    .panel {
        padding: 16px;
        border-radius: 8px;
    }

    .okeei-header .logo {
        font-size: 0.9rem;
    }

    .okeei-content {
        padding: 20px 16px;
    }
}