/* =========================================
   TRANSPARENCY-X DESIGN SYSTEM
   Version: 2.0 (Includes Diplomatic Portal)
   ========================================= */

/* === DESIGN TOKENS === */
:root {
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-text: #0f172a;
    --color-text-muted: #475569;
    --color-primary: #0f172a;
    --color-accent: #1d4ed8;
    --color-border: #e2e8f0;
    --color-success: #166534;
    --color-success-bg: #dcfce7;
    --color-error: #991b1b;
    --color-error-bg: #fee2e2;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Merriweather', Georgia, serif;
    --max-width: 1200px;
    --radius: 6px;
    --transition: 0.2s ease;
}

/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { font-family: var(--font-serif); line-height: 1.2; }
h1 { font-size: clamp(2.5rem, 5vw, 3.75rem); font-weight: 700; }
h2 { font-size: 1.75rem; margin-bottom: 1.5rem; }
h3 { font-size: 1.25rem; font-weight: 700; }
h4 { font-size: 1.0625rem; font-weight: 700; }
p { margin-bottom: 1rem; }
time { font-size: 0.875rem; color: var(--color-text-muted); }
ul { list-style: none; }

/* === LAYOUT === */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 5rem 0; }.section-alt { background: var(--color-bg-alt); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.5rem; }

/* === HEADER & NAV === */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,0.95); backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}
.nav-container { display: flex; align-items: center; justify-content: space-between; height: 4rem; }
.logo { font-size: 1.25rem; font-weight: 700; letter-spacing: -0.02em; }
.main-nav { display: flex; align-items: center; gap: 2rem; font-size: 0.9375rem; font-weight: 500; }
.main-nav a:not(.btn):hover { color: var(--color-text); }

/* Mobile Toggle */
.mobile-toggle { display: none; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.mobile-toggle span { display: block; width: 24px; height: 2px; background: var(--color-text); margin: 5px 0; transition: var(--transition); }

/* === BUTTONS === */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 0.75rem 1.5rem; border-radius: var(--radius);
    font-weight: 600; font-size: 0.9375rem;
    transition: all var(--transition); border: 1px solid transparent; cursor: pointer;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: #1e293b; color: #fff; }
.btn-outline { border-color: var(--color-border); color: var(--color-text-muted); background: transparent; }
.btn-outline:hover { border-color: var(--color-text); color: var(--color-text); }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* === HERO === */
.hero { padding: 6rem 0 5rem; }
.hero .container { max-width: 800px; }
.hero-diplomatic { background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%); color: #fff; }
.hero-diplomatic .eyebrow { color: #93c5fd; }
.hero-diplomatic .lead { color: #cbd5e1; }
.hero-diplomatic h1 { color: #fff; }
.eyebrow { display: block; font-size: 0.8125rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-accent); margin-bottom: 1rem; }
.lead { font-size: 1.25rem; color: var(--color-text-muted); margin: 1.5rem 0 2.5rem; line-height: 1.7; }
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

/* === STATUS BADGE (Diplomatic) === */
.status-badge {
    display: inline-flex; align-items: center; gap: 0.5rem;
    background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2);
    padding: 0.375rem 0.875rem; border-radius: 100px;
    font-size: 0.8125rem; font-weight: 600; margin-bottom: 1.5rem; color: #e2e8f0;}
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #4ade80; animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

/* === CARDS === */
.card {
    background: var(--color-bg); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: 1.5rem;
    transition: border-color var(--transition);
}
.card:hover { border-color: #94a3b8; }
.card-highlight { padding: 2rem; }
.card-diplomatic { padding: 2rem; }
.card-header-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem; margin-bottom: 0.75rem; }
.card-meta { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; }
.badge {
    display: inline-block; background: #dbeafe; color: #1e40af;
    font-size: 0.75rem; font-weight: 700; padding: 0.125rem 0.5rem; border-radius: 4px; white-space: nowrap;
}
.badge-active { background: #fef3c7; color: #92400e; }
.badge-complete { background: var(--color-success-bg); color: var(--color-success); }
.card-category { display: block; font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-muted); margin-bottom: 0.5rem; }
.card h3 a:hover { color: var(--color-accent); }

/* Meta List (Diplomatic Cards) */
.meta-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; margin: 1.25rem 0; padding-top: 1.25rem; border-top: 1px solid var(--color-border); }
.meta-list dt { font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text-muted); font-weight: 600; }
.meta-list dd { font-size: 0.875rem; font-weight: 600; margin-top: 0.125rem; }

/* === FORMS === */
.form-group { margin-bottom: 1.5rem; }
label { display: block; font-weight: 600; margin-bottom: 0.5rem; font-size: 0.9375rem; }
input, select, textarea {
    width: 100%; padding: 0.75rem; border: 1px solid var(--color-border);
    border-radius: var(--radius); font-family: inherit; font-size: 1rem;
    transition: border-color var(--transition); background: var(--color-bg);
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--color-accent); }
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible {
    outline: 2px solid var(--color-accent); outline-offset: 2px;
}
textarea { min-height: 150px; resize: vertical; }
.form-status { margin-top: 1rem; padding: 0.75rem; border-radius: var(--radius); font-size: 0.9375rem; display: none; }
.form-status.success { display: block; background: var(--color-success-bg); color: var(--color-success); }
.form-status.error { display: block; background: var(--color-error-bg); color: var(--color-error); }

/* Auth Form (Diplomatic) */
.auth-form { text-align: left; background: var(--color-bg); padding: 2rem; border-radius: var(--radius); border: 1px solid var(--color-border); }

/* === FILTER BAR (Research) === */.filter-bar { display: flex; gap: 0.5rem; margin-bottom: 2rem; flex-wrap: wrap; }
.filter-btn.active { pointer-events: none; }
.research-item { animation: fadeIn 0.3s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

/* === TIMELINE (Diplomatic) === */
.timeline { position: relative; padding-left: 2rem; border-left: 2px solid var(--color-border); }
.timeline-item { position: relative; padding-bottom: 2.5rem; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
    content: ''; position: absolute; left: -2.375rem; top: 0.375rem;
    width: 12px; height: 12px; border-radius: 50%;
    background: var(--color-accent); border: 2px solid var(--color-bg);
}
.timeline-past::before { background: var(--color-border); }
.timeline-item time { font-size: 0.8125rem; font-weight: 600; color: var(--color-accent); display: block; margin-bottom: 0.25rem; }
.timeline-past time { color: var(--color-text-muted); }
.timeline-item h4 { margin-bottom: 0.25rem; }
.timeline-item p { font-size: 0.9375rem; color: var(--color-text-muted); margin-bottom: 0; }

/* === FOOTER === */
.site-footer { background: var(--color-bg-alt); border-top: 1px solid var(--color-border); padding: 3rem 0; margin-top: 4rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; font-size: 0.875rem; color: var(--color-text-muted); }
.footer-brand { font-weight: 700; color: var(--color-text); margin-bottom: 0.5rem; }
.footer-heading { font-weight: 600; color: var(--color-text); margin-bottom: 0.75rem; }
.footer-grid ul { list-style: none; }
.footer-grid li { margin-bottom: 0.5rem; }
.text-xs { font-size: 0.75rem; color: #94a3b8; margin-top: 0.5rem; }

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .mobile-toggle { display: block; }
    .main-nav {
        display: none; position: absolute; top: 4rem; left: 0; right: 0;
        background: var(--color-bg); border-bottom: 1px solid var(--color-border);
        flex-direction: column; padding: 1.5rem; gap: 1rem;
    }
    .main-nav.active { display: flex; }
    .hero { padding: 3rem 0; }
    h1 { font-size: 2.25rem; }
    .grid-2 { grid-template-columns: 1fr; }
    .meta-list { grid-template-columns: 1fr; gap: 0.5rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
    .footer-grid { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; }
    .btn { width: 100%; }
    .card-header-row { flex-direction: column; }
       }