:root {
    --aip-bg: #f4f1ec;
    --aip-bg-accent: #fef8f1;
    --aip-text: #1d1c1a;
    --aip-muted: #6b665f;
    --aip-card: #ffffff;
    --aip-card-dark: #2c2a26;
    --aip-accent: #ff7a30;
    --aip-accent-dark: #d55819;
    --aip-border: #e6dfd6;
    --aip-shadow: 0 20px 40px rgba(22, 18, 10, 0.08);
    --aip-radius: 18px;
}

[data-theme="dark"] {
    --aip-bg: #11110f;
    --aip-bg-accent: #1a1916;
    --aip-text: #f2eee9;
    --aip-muted: #a79e93;
    --aip-card: #1c1b18;
    --aip-card-dark: #26241f;
    --aip-accent: #ff9f4a;
    --aip-accent-dark: #ff7a30;
    --aip-border: #2c2a26;
    --aip-shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: 'IBM Plex Sans', sans-serif;
    color: var(--aip-text);
    background: radial-gradient(circle at 10% 10%, rgba(255, 177, 124, 0.3), transparent 45%),
        radial-gradient(circle at 90% 20%, rgba(100, 180, 255, 0.2), transparent 40%),
        var(--aip-bg);
    min-height: 100vh;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: linear-gradient(120deg, rgba(255, 255, 255, 0.04) 0%, transparent 60%);
    pointer-events: none;
    z-index: -1;
}

a {
    color: inherit;
    text-decoration: none;
}

.site-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 40px;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(12px);
    z-index: 10;
}

[data-theme="dark"] .site-header {
    background: rgba(17, 17, 15, 0.7);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.logo-mark {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--aip-accent);
    box-shadow: 0 0 20px rgba(255, 122, 48, 0.6);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 16px;
}

.site-nav a {
    color: var(--aip-text);
    font-weight: 500;
}

.site-nav a.btn {
    color: #fff;
}

.mobile-nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    border: none;
    background: transparent;
}

.mobile-nav-toggle span {
    display: block;
    width: 26px;
    height: 2px;
    background: var(--aip-text);
}

.site-main {
    padding: 40px;
}

.btn {
    padding: 10px 18px;
    border-radius: 999px;
    border: 1px solid transparent;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--aip-shadow);
}

.btn-primary {
    background: var(--aip-accent);
    color: #fff;
}

.btn-secondary {
    background: transparent;
    border-color: var(--aip-border);
    color: var(--aip-text);
}

.icon-button {
    border: 1px solid var(--aip-border);
    background: transparent;
    border-radius: 10px;
    padding: 6px;
    cursor: pointer;
}

.icon-button.danger {
    border-color: rgba(200, 50, 50, 0.5);
    color: #e44;
}

.icon {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    stroke-width: 1.8;
    fill: none;
}

.hero {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    align-items: center;
    padding: 40px 0 60px;
    animation: fadeIn 0.8s ease;
}

.hero-content h1 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2.2rem, 3vw, 3.4rem);
    margin-bottom: 12px;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.2em;
    font-size: 0.75rem;
    color: var(--aip-muted);
}

.lead {
    font-size: 1.1rem;
    color: var(--aip-muted);
}

.hero-panel {
    display: grid;
    gap: 20px;
}

.panel-card {
    background: var(--aip-card);
    border-radius: var(--aip-radius);
    padding: 24px;
    box-shadow: var(--aip-shadow);
}

.panel-header {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 12px;
}

.panel-header span {
    color: var(--aip-muted);
}

.hero-actions {
    display: flex;
    gap: 12px;
    margin: 24px 0;
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    color: var(--aip-muted);
}

.hero-badges span {
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid var(--aip-border);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin: 40px 0;
}

.feature-grid article {
    background: var(--aip-card);
    padding: 20px;
    border-radius: var(--aip-radius);
    box-shadow: var(--aip-shadow);
}

.cta {
    background: var(--aip-card-dark);
    color: #fff;
    padding: 32px;
    border-radius: var(--aip-radius);
    text-align: center;
}

.site-footer {
    margin-top: 40px;
    padding: 24px 40px;
    border-top: 1px solid var(--aip-border);
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: space-between;
    color: var(--aip-muted);
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.auth {
    display: flex;
    justify-content: center;
    padding: 40px 0;
}

.auth-card {
    background: var(--aip-card);
    padding: 32px;
    border-radius: var(--aip-radius);
    box-shadow: var(--aip-shadow);
    width: min(420px, 100%);
}

.auth-actions {
    margin: 16px 0;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.form {
    display: grid;
    gap: 16px;
    margin-top: 16px;
}

.form label {
    display: grid;
    gap: 8px;
    font-weight: 500;
}

input, select, textarea {
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid var(--aip-border);
    background: var(--aip-bg-accent);
    color: var(--aip-text);
    font-family: inherit;
}

textarea {
    resize: vertical;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert {
    padding: 12px 16px;
    background: rgba(255, 120, 120, 0.15);
    border: 1px solid rgba(255, 120, 120, 0.3);
    border-radius: 12px;
    margin: 12px 0;
}

.alert.success {
    background: rgba(120, 200, 120, 0.15);
    border-color: rgba(120, 200, 120, 0.3);
}

.muted {
    color: var(--aip-muted);
}

.dashboard {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 24px;
}

.threads-panel {
    background: var(--aip-card);
    border-radius: var(--aip-radius);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-shadow: var(--aip-shadow);
}

.panel-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.panel-footer {
    border-top: 1px solid var(--aip-border);
    padding-top: 12px;
    display: grid;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--aip-muted);
}

.user-meta span,
.plan-meta span {
    display: block;
}

.thread-list {
    display: grid;
    gap: 10px;
}

.thread-item {
    background: var(--aip-bg-accent);
    border-radius: 12px;
    padding: 10px 12px;
    cursor: pointer;
    border: 1px solid transparent;
    display: grid;
    gap: 6px;
    position: relative;
}

.thread-title {
    font-weight: 600;
}

.thread-meta {
    font-size: 0.75rem;
    color: var(--aip-muted);
}

.thread-item.active {
    border-color: var(--aip-accent);
}

.thread-actions {
    position: absolute;
    top: 8px;
    right: 8px;
}

.chat-panel {
    background: var(--aip-card);
    border-radius: var(--aip-radius);
    padding: 20px;
    display: grid;
    gap: 16px;
    box-shadow: var(--aip-shadow);
}

.chat-header {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.chat-controls {
    display: grid;
    gap: 12px;
}

.model-select {
    display: grid;
    gap: 6px;
}

.call-controls {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.chat-history {
    min-height: 280px;
    max-height: 420px;
    overflow-y: auto;
    padding: 10px;
    background: var(--aip-bg-accent);
    border-radius: 16px;
    display: grid;
    gap: 12px;
}

.message {
    display: flex;
}

.message.user {
    justify-content: flex-end;
}

.message .bubble {
    padding: 12px 14px;
    border-radius: 16px;
    background: var(--aip-card);
    max-width: 70%;
    box-shadow: var(--aip-shadow);
}

.message.user .bubble {
    background: var(--aip-accent);
    color: #fff;
}

.chat-input {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px;
}

.chat-loader {
    display: none;
    align-items: center;
    gap: 10px;
    color: var(--aip-muted);
}

.chat-loader.active {
    display: flex;
}

.loader-ring {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 3px solid var(--aip-border);
    border-top-color: var(--aip-accent);
    animation: spin 1s linear infinite;
}

.voice-panel {
    background: var(--aip-bg-accent);
    padding: 16px;
    border-radius: 16px;
    display: grid;
    gap: 12px;
}

.voice-header {
    display: grid;
    gap: 4px;
}

.voice-controls {
    display: flex;
    gap: 10px;
}

.billing {
    display: grid;
    gap: 24px;
}

.billing-header {
    display: grid;
    gap: 8px;
}

.legal {
    display: grid;
    gap: 24px;
}

.legal .admin-card {
    max-width: 900px;
    margin: 0 auto;
}

.plan-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.plan-card {
    background: var(--aip-card);
    padding: 24px;
    border-radius: var(--aip-radius);
    box-shadow: var(--aip-shadow);
}

.plan-price {
    font-size: 1.6rem;
    margin: 10px 0;
}

.admin {
    display: grid;
    gap: 24px;
}

.admin-header {
    display: grid;
    gap: 8px;
}

.admin-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.admin-grid {
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.admin-card {
    background: var(--aip-card);
    padding: 24px;
    border-radius: var(--aip-radius);
    box-shadow: var(--aip-shadow);
}

.table {
    display: grid;
    gap: 12px;
}

.table-row {
    background: var(--aip-bg-accent);
    border-radius: 12px;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.row-actions,
.row-controls {
    display: flex;
    gap: 8px;
    align-items: center;
    flex-wrap: wrap;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px;
}

.stat-card {
    background: var(--aip-card);
    padding: 18px;
    border-radius: 16px;
    box-shadow: var(--aip-shadow);
    display: grid;
    gap: 6px;
}

.inline {
    display: inline-block;
}

.empty-state {
    text-align: center;
    padding: 30px 10px;
    color: var(--aip-muted);
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

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

@media (max-width: 900px) {
    .site-header {
        padding: 16px 20px;
    }

    .site-main {
        padding: 20px;
    }

    .dashboard {
        grid-template-columns: 1fr;
    }

    .mobile-nav-toggle {
        display: flex;
    }

    .site-nav {
        display: none;
        position: absolute;
        right: 20px;
        top: 70px;
        flex-direction: column;
        background: var(--aip-card);
        padding: 16px;
        border-radius: 16px;
        box-shadow: var(--aip-shadow);
    }

    .site-nav.open {
        display: flex;
    }

    .chat-input {
        grid-template-columns: 1fr;
    }
}