/* DS Applied AI & Architecture - Theme System */

/* Light Theme Tokens */
html[data-theme="light"] {
    --onyx: #F8F9FA;
    --dark-gray: #FFFFFF;
    --white: #0A0A0A;
    --chrome: #52525B;
    --border: #E4E4E7;
    --accent: #059669;
}

body {
    transition: background-color 0.25s ease, color 0.25s ease;
}

/* Header Base & Responsive */
header {
    display: grid !important;
    grid-template-columns: 1fr auto 1fr;
    padding: 20px 5% !important;
    align-items: center;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    box-sizing: border-box;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(39, 39, 42, 0.5);
    background: rgba(10, 10, 10, 0.8);
    transition: background-color 0.25s ease, border-color 0.25s ease;
}

html[data-theme="light"] header {
    background: rgba(248, 249, 250, 0.88);
    border-bottom: 1px solid rgba(228, 228, 231, 0.9);
}

header .nav {
    display: flex;
    gap: 40px;
    justify-content: center;
}

header .nav a {
    color: var(--chrome);
    text-decoration: none;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.2s;
    margin-left: 0 !important;
}

header .nav a:hover, header .nav a.active {
    color: var(--white);
}

.header-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 20px;
}

header .header-phone {
    text-align: right;
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    font-weight: 700;
}

header .header-phone a {
    color: var(--white) !important;
    text-decoration: none;
    transition: color 0.2s;
}

header .header-phone a:hover {
    color: var(--accent) !important;
}

@media (max-width: 1000px) {
    header {
        display: flex !important;
        flex-direction: column;
        gap: 12px;
        padding: 15px 5% !important;
    }
    header .nav {
        flex-wrap: wrap;
        gap: 15px;
        justify-content: center;
    }
    .header-actions {
        justify-content: center !important;
        gap: 16px !important;
        width: 100%;
    }
    header .header-phone {
        text-align: center;
    }
}

/* Theme Toggle Button */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--chrome);
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 700;
    padding: 6px 12px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    border-radius: 3px;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    user-select: none;
    line-height: 1;
}

.theme-toggle:hover {
    border-color: var(--accent);
    color: var(--white);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.15);
}

.theme-icon-sun, .theme-text-light {
    display: inline-block;
    vertical-align: middle;
}

.theme-icon-moon, .theme-text-dark {
    display: none;
    vertical-align: middle;
}

html[data-theme="light"] .theme-icon-sun,
html[data-theme="light"] .theme-text-light {
    display: none;
}

html[data-theme="light"] .theme-icon-moon,
html[data-theme="light"] .theme-text-dark {
    display: inline-block;
}

/* Cursor Glow */
html[data-theme="light"] .cursor-glow {
    background: radial-gradient(circle, rgba(5, 150, 105, 0.06) 0%, rgba(248, 249, 250, 0) 65%) !important;
}

/* Selection */
html[data-theme="light"] ::selection {
    background: #059669;
    color: #FFFFFF;
}

/* Typography Gradient Overrides */
html[data-theme="light"] #hero h1,
html[data-theme="light"] .page-header h1,
html[data-theme="light"] .info-col h1 {
    background: linear-gradient(180deg, #0A0A0A 0%, #52525B 100%) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
}

/* Buttons */
html[data-theme="light"] .btn-primary {
    background: #0A0A0A !important;
    color: #10B981 !important;
}

html[data-theme="light"] .btn-primary:hover {
    background: #18181B !important;
    box-shadow: 0 0 25px rgba(0, 0, 0, 0.2) !important;
}

/* Bento, Cards, Surfaces */
html[data-theme="light"] .bento-card,
html[data-theme="light"] .card,
html[data-theme="light"] .impact-card,
html[data-theme="light"] .calc-container,
html[data-theme="light"] .cta-box,
html[data-theme="light"] .metric-item,
html[data-theme="light"] .result-section,
html[data-theme="light"] .input-section,
html[data-theme="light"] .content-block,
html[data-theme="light"] .protocol-card,
html[data-theme="light"] .post-card,
html[data-theme="light"] .article-card {
    background: #FFFFFF !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

html[data-theme="light"] .bento-card:hover,
html[data-theme="light"] .card:hover {
    border-color: #A1A1AA !important;
}

html[data-theme="light"] .stack-tag {
    color: #71717A !important;
}

/* Protocol Timeline */
html[data-theme="light"] .protocol-item::before {
    background: #FFFFFF !important;
    border-color: #71717A !important;
}

html[data-theme="light"] .protocol-item:hover::before {
    background: #0A0A0A !important;
    border-color: #0A0A0A !important;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3) !important;
}

/* Terminal & Interactive Demo */
html[data-theme="light"] .demo-side.arch-side {
    background: #FFFFFF !important;
    border: 1px solid var(--border) !important;
}

html[data-theme="light"] .demo-side.human-side {
    background: #F8F9FA !important;
    border: 1px solid var(--border) !important;
}

html[data-theme="light"] #human-type {
    background: #F1F5F9 !important;
    color: #0A0A0A !important;
    border: 1px solid var(--border) !important;
}

html[data-theme="light"] .terminal,
html[data-theme="light"] .terminal-col {
    background: #FFFFFF !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06) !important;
}

html[data-theme="light"] .term-header {
    background: #F4F4F5 !important;
}

header .nav a {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
}

@media (max-width: 768px) {
    #shift .shift-grid {
        grid-template-columns: minmax(0, 1fr) !important;
        gap: 20px !important;
    }

    #shift .divider {
        display: none;
    }

    .demo-container {
        grid-template-columns: minmax(0, 1fr) !important;
        height: auto !important;
    }

    .demo-container .demo-side {
        min-width: 0;
        min-height: 260px;
        padding: 20px !important;
    }

    #roi-calculator .calc-container {
        grid-template-columns: minmax(0, 1fr) !important;
        padding: 24px !important;
    }

    #roi-calculator .calc-results {
        border-left: 0;
        border-top: 2px solid var(--border);
        padding: 24px 0 0;
    }

    #terminal .terminal {
        box-sizing: border-box;
        width: 100%;
        max-width: 100%;
        padding: 24px;
        overflow-wrap: anywhere;
    }

    #terminal .term-line {
        min-width: 0;
        flex-wrap: wrap;
        gap: 8px;
        overflow-wrap: anywhere;
    }

    #terminal .term-input {
        box-sizing: border-box;
        width: min(100%, 300px);
        max-width: 100%;
        min-width: 0;
    }

    footer > div:first-child {
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
        gap: 24px !important;
    }

    footer > div:first-child > div {
        min-width: 0;
        overflow-wrap: anywhere;
    }
}

@media (max-width: 480px) {
    .impact-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .impact-card {
        min-width: 0;
        padding: 24px;
    }

    footer > div:first-child {
        grid-template-columns: minmax(0, 1fr) !important;
    }

    #ds-chat-widget {
        right: 15px;
        left: 15px;
    }
}

@media (prefers-reduced-motion: reduce), print {
    .fade-up {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
}

html[data-theme="light"] .dot {
    background: #D4D4D8 !important;
}

html[data-theme="light"] .term-input {
    color: #0A0A0A !important;
    border-bottom: 1px dashed var(--border) !important;
}

html[data-theme="light"] .term-input::placeholder {
    color: #A1A1AA !important;
}

html[data-theme="light"] .term-btn,
html[data-theme="light"] .term-submit {
    background: #0A0A0A !important;
    color: #10B981 !important;
}

html[data-theme="light"] .term-btn:hover,
html[data-theme="light"] .term-submit:hover {
    background: #18181B !important;
}

html[data-theme="light"] .term-select {
    background: #F8F9FA !important;
    color: #0A0A0A !important;
    border-bottom: 1px dashed var(--border) !important;
}

html[data-theme="light"] .term-select option {
    background: #FFFFFF !important;
    color: #0A0A0A !important;
}

/* FAQ */
html[data-theme="light"] details p {
    border-left: 2px solid var(--border) !important;
}

/* Security banner */
html[data-theme="light"] .security-banner {
    background: rgba(16, 185, 129, 0.05) !important;
}

/* Calculator Slider */
html[data-theme="light"] .calc-slider {
    background: #E4E4E7 !important;
}

html[data-theme="light"] .calc-slider::-webkit-slider-thumb {
    border-color: #FFFFFF !important;
}

html[data-theme="light"] .calc-slider::-moz-range-thumb {
    border-color: #FFFFFF !important;
}

/* AI Architect Widget */
html[data-theme="light"] #ds-chat-toggle {
    background: #FFFFFF !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08) !important;
}

html[data-theme="light"] #ds-chat-window {
    background: #FFFFFF !important;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15) !important;
}

html[data-theme="light"] #ds-chat-header {
    background: #F4F4F5 !important;
    color: #0A0A0A !important;
}

html[data-theme="light"] #ds-chat-input-area {
    background: #FFFFFF !important;
    border-top: 1px dashed var(--border) !important;
}

html[data-theme="light"] #ds-chat-input {
    color: #0A0A0A !important;
}

html[data-theme="light"] .msg-bot {
    background: rgba(16, 185, 129, 0.08) !important;
    color: #27272A !important;
}

html[data-theme="light"] .msg-bot strong {
    color: #0A0A0A !important;
}

html[data-theme="light"] .msg-user {
    background: rgba(0, 0, 0, 0.04) !important;
    color: #0A0A0A !important;
    border-right: 2px solid #0A0A0A !important;
}