/* =============================================================
   IAS AutoEmail - Main Design System
   Premium dark/blue tech theme with glassmorphism
   ============================================================= */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500&display=swap');

/* ---------- CSS Custom Properties ---------- */
:root {
    /* Brand palette */
    --primary:        #4a6cf7;
    --primary-light:  #6b8aff;
    --primary-dark:   #3451c7;
    --primary-glow:   rgba(74, 108, 247, 0.35);
    --accent:         #6a3de8;
    --accent-light:   #8b5cf6;

    /* Backgrounds */
    --bg-body:        #0a0e1a;
    --bg-surface:     #111827;
    --bg-card:        #1a1f35;
    --bg-card-hover:  #222845;
    --bg-glass:       rgba(26, 31, 53, 0.7);
    --bg-input:       #151b30;
    --bg-hero:        linear-gradient(135deg, #0a0e1a 0%, #111d3a 50%, #0d1526 100%);

    /* Text */
    --text-primary:   #f0f2f8;
    --text-secondary: #8892b0;
    --text-muted:     #5b6480;
    --text-white:     #ffffff;

    /* Borders */
    --border-color:   rgba(255,255,255,0.06);
    --border-light:   rgba(255,255,255,0.1);

    /* Status */
    --success:   #10b981;
    --success-bg:rgba(16,185,129,0.12);
    --warning:   #f59e0b;
    --warning-bg:rgba(245,158,11,0.12);
    --danger:    #ef4444;
    --danger-bg: rgba(239,68,68,0.12);
    --info:      #3b82f6;
    --info-bg:   rgba(59,130,246,0.12);

    /* Radii */
    --radius-sm:   6px;
    --radius-md:   10px;
    --radius-lg:   16px;
    --radius-xl:   24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm:     0 1px 3px rgba(0,0,0,0.3);
    --shadow-md:     0 4px 16px rgba(0,0,0,0.35);
    --shadow-lg:     0 8px 32px rgba(0,0,0,0.4);
    --shadow-glow:   0 0 40px var(--primary-glow);

    /* Transitions */
    --transition:    all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;

    /* Typography */
    --font-sans:     'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono:     'JetBrains Mono', monospace;

    /* Spacing (base 4px) */
    --sp-1:  4px;   --sp-2:  8px;   --sp-3:  12px;
    --sp-4:  16px;  --sp-5:  20px;  --sp-6:  24px;
    --sp-8:  32px;  --sp-10: 40px;  --sp-12: 48px;
    --sp-16: 64px;  --sp-20: 80px;  --sp-24: 96px;

    /* Container */
    --container-max: 1200px;
    --container-sm:  640px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

a {
    color: var(--primary-light);
    text-decoration: none;
    transition: var(--transition-fast);
}
a:hover { color: var(--primary); }

img { max-width: 100%; height: auto; display: block; }

ul, ol { list-style: none; }

h1,h2,h3,h4,h5,h6 {
    color: var(--text-white);
    line-height: 1.3;
    font-weight: 700;
}
h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }
h4 { font-size: 1.15rem; }

/* ---------- Container ---------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--sp-6);
}
.container-sm {
    max-width: var(--container-sm);
    margin: 0 auto;
    padding: 0 var(--sp-6);
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-2);
    padding: 12px 28px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    white-space: nowrap;
    line-height: 1.4;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: var(--text-white);
    box-shadow: 0 4px 20px var(--primary-glow);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--primary-glow);
    color: var(--text-white);
}

.btn-outline {
    background: transparent;
    color: var(--primary-light);
    border: 1.5px solid var(--primary);
}
.btn-outline:hover {
    background: var(--primary);
    color: var(--text-white);
    transform: translateY(-2px);
}

.btn-ghost {
    background: rgba(255,255,255,0.05);
    color: var(--text-secondary);
    border: 1px solid var(--border-light);
}
.btn-ghost:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text-white);
}

.btn-success { background: var(--success); color: #fff; }
.btn-danger  { background: var(--danger);  color: #fff; }
.btn-sm { padding: 8px 18px; font-size: 0.85rem; }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }
.btn-block { width: 100%; }

.btn:disabled, .btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ---------- Form Inputs ---------- */
.form-group {
    margin-bottom: var(--sp-5);
}
.form-group label {
    display: block;
    margin-bottom: var(--sp-2);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}
.form-control {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1.5px solid var(--border-light);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: var(--transition);
    outline: none;
}
.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}
.form-control::placeholder { color: var(--text-muted); }
select.form-control { cursor: pointer; }
textarea.form-control { min-height: 120px; resize: vertical; }

.form-hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* ---------- Cards ---------- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--sp-6);
    transition: var(--transition);
}
.card:hover {
    border-color: var(--border-light);
}
.card-glass {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-light);
}

/* ---------- Badges ---------- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    letter-spacing: 0.3px;
    text-transform: uppercase;
}
.badge-blue   { background:rgba(74,108,247,0.15); color:#6b8aff; }
.badge-green  { background:var(--success-bg); color:var(--success); }
.badge-red    { background:var(--danger-bg);  color:var(--danger); }
.badge-yellow { background:var(--warning-bg); color:var(--warning); }
.badge-purple { background:rgba(139,92,246,0.15); color:#a78bfa; }
.badge-teal   { background:rgba(20,184,166,0.15); color:#2dd4bf; }
.badge-orange { background:rgba(249,115,22,0.15); color:#fb923c; }
.badge-gray   { background:rgba(148,163,184,0.12); color:#94a3b8; }

/* ---------- Alerts ---------- */
.alert {
    padding: var(--sp-4) var(--sp-5);
    border-radius: var(--radius-md);
    margin-bottom: var(--sp-5);
    font-size: 0.9rem;
    border-left: 4px solid;
}
.alert-success { background:var(--success-bg); border-color:var(--success); color:var(--success); }
.alert-danger  { background:var(--danger-bg);  border-color:var(--danger);  color:var(--danger);  }
.alert-warning { background:var(--warning-bg); border-color:var(--warning); color:var(--warning); }
.alert-info    { background:var(--info-bg);    border-color:var(--info);    color:var(--info);    }

/* ---------- Stat Cards ---------- */
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--sp-6);
    display: flex;
    align-items: center;
    gap: var(--sp-4);
    transition: var(--transition);
}
.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-light);
}
.stat-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}
.stat-icon.blue   { background:rgba(74,108,247,0.15); color:var(--primary-light); }
.stat-icon.green  { background:var(--success-bg); color:var(--success); }
.stat-icon.purple { background:rgba(139,92,246,0.15); color:#a78bfa; }
.stat-icon.orange { background:rgba(249,115,22,0.15); color:#fb923c; }
.stat-info h4 {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 2px;
}
.stat-info p {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ---------- Table ---------- */
.table-wrap {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}
th {
    background: var(--bg-card);
    color: var(--text-secondary);
    text-align: left;
    font-weight: 600;
    padding: 14px 16px;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}
td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}
tr:hover td { background: rgba(255,255,255,0.02); }
tr:last-child td { border-bottom: none; }

/* ---------- Section Helpers ---------- */
.section {
    padding: var(--sp-20) 0;
}
.section-sm { padding: var(--sp-12) 0; }
.section-header {
    text-align: center;
    margin-bottom: var(--sp-12);
}
.section-header .overline {
    display: inline-block;
    color: var(--primary-light);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: var(--sp-3);
}
.section-header h2 {
    margin-bottom: var(--sp-3);
}
.section-header p {
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.05rem;
}

/* ---------- Grid ---------- */
.grid { display: grid; gap: var(--sp-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

/* ---------- Flex helpers ---------- */
.flex    { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.gap-2 { gap: var(--sp-2); }
.gap-4 { gap: var(--sp-4); }
.gap-6 { gap: var(--sp-6); }

/* ---------- Text helpers ---------- */
.text-center { text-align: center; }
.text-sm  { font-size: 0.875rem; }
.text-xs  { font-size: 0.75rem; }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-primary-c { color: var(--primary-light); }
.text-success { color: var(--success); }
.text-danger  { color: var(--danger); }
.font-mono { font-family: var(--font-mono); }
.font-bold { font-weight: 700; }

/* ---------- Spacing ---------- */
.mt-2  { margin-top: var(--sp-2); }
.mt-4  { margin-top: var(--sp-4); }
.mt-6  { margin-top: var(--sp-6); }
.mt-8  { margin-top: var(--sp-8); }
.mb-4  { margin-bottom: var(--sp-4); }
.mb-6  { margin-bottom: var(--sp-6); }
.mb-8  { margin-bottom: var(--sp-8); }

/* ---------- Divider ---------- */
.divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--sp-6) 0;
}

/* ---------- Empty state ---------- */
.empty-state {
    text-align: center;
    padding: var(--sp-16) var(--sp-6);
    color: var(--text-muted);
}
.empty-state .empty-icon {
    font-size: 3rem;
    margin-bottom: var(--sp-4);
    opacity: 0.4;
}

/* ---------- Loader ---------- */
.spinner {
    width: 20px; height: 20px;
    border: 2.5px solid rgba(255,255,255,0.15);
    border-top-color: var(--primary-light);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Animations ---------- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}
.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}
.animate-in-delay-1 { animation-delay: 0.1s; opacity: 0; }
.animate-in-delay-2 { animation-delay: 0.2s; opacity: 0; }
.animate-in-delay-3 { animation-delay: 0.3s; opacity: 0; }
.animate-in-delay-4 { animation-delay: 0.4s; opacity: 0; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-body); }
::-webkit-scrollbar-thumb { background: var(--bg-card-hover); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }