/* ═══════════════════════════════════════════════════════════════
   MORNING BRIEF — World-Class Executive Briefing
   ═══════════════════════════════════════════════════════════════ */

:root {
    /* Light mode */
    --bg-primary: #FAFAF9;
    --bg-secondary: #FFFFFF;
    --bg-tertiary: #F5F5F4;
    --text-primary: #1C1917;
    --text-secondary: #57534E;
    --text-tertiary: #A8A29E;
    --accent: #2563EB;
    --accent-hover: #1D4ED8;
    --border: #E7E5E4;
    --border-strong: #D6D3D1;
    --highlight-bg: #FEF3C7;
    --highlight-border: #F59E0B;
    --success: #059669;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #0C0A09;
        --bg-secondary: #1C1917;
        --bg-tertiary: #292524;
        --text-primary: #FAFAF9;
        --text-secondary: #A8A29E;
        --text-tertiary: #78716C;
        --accent: #60A5FA;
        --accent-hover: #93C5FD;
        --border: #292524;
        --border-strong: #44403C;
        --highlight-bg: #422006;
        --highlight-border: #D97706;
        --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 15px -3px rgba(0,0,0,0.5);
    }
}

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

html {
    font-size: 18px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    line-height: 1.6;
}

/* ═══════════════════════════════════════════════════════════════
   HEADER
   ═══════════════════════════════════════════════════════════════ */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
}

.header-inner {
    max-width: 800px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: -0.01em;
}

.brand-icon {
    color: var(--accent);
    font-size: 1.1rem;
}

.brand-text {
    color: var(--text-primary);
}

.header-nav {
    display: flex;
    gap: 24px;
}

.header-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: color 0.15s;
}

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

/* ═══════════════════════════════════════════════════════════════
   DATE NAVIGATION
   ═══════════════════════════════════════════════════════════════ */

.date-nav {
    max-width: 800px;
    margin: 0 auto;
    padding: 32px 24px 24px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 32px;
}

.nav-arrow {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.15s;
    box-shadow: var(--shadow-sm);
}

.nav-arrow:hover:not(.disabled) {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border-color: var(--border-strong);
}

.nav-arrow.disabled {
    opacity: 0.3;
    pointer-events: none;
}

.date-display {
    text-align: center;
}

.date-weekday {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin-bottom: 4px;
}

.date-full {
    display: block;
    font-family: 'Fraunces', Georgia, 'Times New Roman', serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

/* ═══════════════════════════════════════════════════════════════
   AUDIO BAR
   ═══════════════════════════════════════════════════════════════ */

.audio-bar {
    max-width: 800px;
    margin: 0 auto 32px;
    padding: 0 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.audio-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    font-family: 'Inter', sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    color: white;
    background: var(--accent);
    border: none;
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.15s;
    box-shadow: var(--shadow-sm);
}

.audio-btn:hover:not(:disabled) {
    background: var(--accent-hover);
    box-shadow: var(--shadow-md);
}

.audio-btn:disabled {
    opacity: 0.6;
    cursor: wait;
}

#audio-status {
    font-size: 0.8rem;
    color: var(--text-tertiary);
}

/* ═══════════════════════════════════════════════════════════════
   BRIEF CONTENT
   ═══════════════════════════════════════════════════════════════ */

.brief-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 24px 80px;
}

/* Section Headers */
.brief-content h2 {
    font-family: 'Fraunces', Georgia, 'Times New Roman', serif;
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 48px 0 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    letter-spacing: -0.02em;
}

.brief-content h2:first-child {
    margin-top: 0;
}

/* The Bottom Line - Featured Box */
.brief-content h2:first-of-type + p {
    background: var(--highlight-bg);
    border-left: 4px solid var(--highlight-border);
    padding: 20px 24px;
    border-radius: 0 8px 8px 0;
    margin: 20px 0 32px;
    font-size: 1.05rem;
    line-height: 1.7;
}

/* Subsection Headers */
.brief-content h3 {
    font-family: 'Inter', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent);
    margin: 32px 0 12px;
}

/* Paragraphs */
.brief-content p {
    font-family: 'Fraunces', Georgia, 'Times New Roman', serif;
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-primary);
    margin: 0 0 20px;
}

/* Strong text within paragraphs */
.brief-content p strong {
    font-weight: 600;
    color: var(--text-primary);
}

/* Lists (Action Items, Worth Knowing) */
.brief-content ul {
    list-style: none;
    padding: 0;
    margin: 16px 0;
}

.brief-content li {
    position: relative;
    padding-left: 24px;
    margin-bottom: 12px;
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.brief-content li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
}

/* Horizontal Rule */
.brief-content hr {
    border: none;
    height: 1px;
    background: var(--border);
    margin: 48px 0 24px;
}

/* Footer text */
.brief-content em {
    font-family: 'Inter', sans-serif;
    font-style: normal;
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

/* ═══════════════════════════════════════════════════════════════
   SITE FOOTER
   ═══════════════════════════════════════════════════════════════ */

.site-footer {
    max-width: 800px;
    margin: 0 auto;
    padding: 24px;
    text-align: center;
    border-top: 1px solid var(--border);
}

.site-footer p {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    margin: 0;
}

/* ═══════════════════════════════════════════════════════════════
   ARCHIVE PAGE
   ═══════════════════════════════════════════════════════════════ */

.archive-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 48px 24px;
}

.archive-page h1 {
    font-family: 'Fraunces', Georgia, 'Times New Roman', serif;
    font-size: 2rem;
    font-weight: 600;
    margin: 0 0 32px;
    letter-spacing: -0.02em;
}

.archive-grid {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--border);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
}

.archive-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-secondary);
    text-decoration: none;
    transition: background 0.15s;
}

.archive-item:hover {
    background: var(--bg-tertiary);
}

.archive-weekday {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-tertiary);
    width: 90px;
}

.archive-date {
    font-family: 'Fraunces', Georgia, 'Times New Roman', serif;
    font-size: 1rem;
    color: var(--text-primary);
}

/* ═══════════════════════════════════════════════════════════════
   LOGIN PAGE
   ═══════════════════════════════════════════════════════════════ */

.login-container {
    max-width: 400px;
    margin: 120px auto;
    padding: 48px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.login-container h1 {
    font-family: 'Fraunces', Georgia, 'Times New Roman', serif;
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
    margin: 0 0 32px;
    letter-spacing: -0.02em;
}

.login-container form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login-container input[type="password"] {
    padding: 14px 16px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.15s;
}

.login-container input[type="password"]:focus {
    outline: none;
    border-color: var(--accent);
}

.login-container button {
    padding: 14px 24px;
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    font-weight: 500;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.15s;
}

.login-container button:hover {
    background: var(--accent-hover);
}

.error {
    padding: 12px 16px;
    background: #FEF2F2;
    border: 1px solid #FECACA;
    border-radius: 8px;
    color: #DC2626;
    font-size: 0.9rem;
    text-align: center;
}

@media (prefers-color-scheme: dark) {
    .error {
        background: #450A0A;
        border-color: #7F1D1D;
        color: #FCA5A5;
    }
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════ */

@media (max-width: 640px) {
    html {
        font-size: 16px;
    }
    
    .header-inner,
    .date-nav,
    .audio-bar,
    .brief-content,
    .archive-page {
        padding-left: 16px;
        padding-right: 16px;
    }
    
    .date-nav {
        gap: 16px;
    }
    
    .date-full {
        font-size: 1.25rem;
    }
    
    .nav-arrow {
        width: 40px;
        height: 40px;
    }
    
    .brief-content h2 {
        font-size: 1.2rem;
    }
    
    .archive-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    
    .archive-weekday {
        width: auto;
    }
}

/* ═══════════════════════════════════════════════════════════════
   PRINT
   ═══════════════════════════════════════════════════════════════ */

@media print {
    .site-header,
    .date-nav,
    .audio-bar,
    .site-footer {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .brief-content {
        max-width: 100%;
        padding: 0;
    }
    
    .brief-content h2:first-of-type + p {
        background: #f5f5f5;
        border-left-color: #333;
    }
}