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

:root {
    --color-primary: #a78bfa;
    --color-bg: #0f0a1a;
    --color-card: #1a1225;
    --color-text: #f3f0ff;
    --color-text-muted: #a09cb5;
    --color-border: #2d2640;
    --color-glow-1: rgba(167, 139, 250, 0.35);
    --color-glow-2: rgba(139, 92, 246, 0.25);
    --color-glow-3: rgba(196, 181, 253, 0.2);
    --color-glow-4: rgba(124, 58, 237, 0.15);
    --color-grid: rgba(167, 139, 250, 0.08);
    --color-node-1: rgba(167, 139, 250, 0.4);
    --color-node-2: rgba(139, 92, 246, 0.35);
    --color-card-bg: rgba(26, 18, 37, 0.85);
    --color-card-accent: rgba(167, 139, 250, 0.3);
    --color-input-bg: #0f0a1a;
    --color-focus-ring: rgba(167, 139, 250, 0.25);
    --btn-hover: #b89dfc;
    --btn-disabled: #3d3550;
    --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --border-radius: 12px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
}

/* AI/Data Themed Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -2;
    background:
        radial-gradient(ellipse 80% 50% at 20% -10%, var(--color-glow-1) 0%, transparent 50%),
        radial-gradient(ellipse 60% 40% at 80% 100%, var(--color-glow-2) 0%, transparent 50%),
        radial-gradient(ellipse 50% 40% at 90% 20%, var(--color-glow-3) 0%, transparent 50%),
        radial-gradient(ellipse 40% 30% at 5% 60%, var(--color-glow-4) 0%, transparent 50%),
        var(--color-bg);
}

/* Grid pattern */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image:
        linear-gradient(to bottom, transparent 0%, transparent 49%, var(--color-grid) 49%, var(--color-grid) 51%, transparent 51%, transparent 100%),
        linear-gradient(to right, transparent 0%, transparent 49%, var(--color-grid) 49%, var(--color-grid) 51%, transparent 51%, transparent 100%);
    background-size: 50px 50px;
    mask-image: radial-gradient(ellipse 120% 100% at 50% 0%, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 120% 100% at 50% 0%, black 0%, transparent 70%);
}

/* Floating nodes decoration */
.bg-nodes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.bg-nodes::before,
.bg-nodes::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    background: var(--color-node-1);
}

.bg-nodes::before {
    width: 8px;
    height: 8px;
    top: 15%;
    left: 10%;
    box-shadow:
        calc(80vw) calc(10vh) 0 var(--color-node-1),
        calc(20vw) calc(70vh) 0 var(--color-node-2),
        calc(70vw) calc(60vh) 0 var(--color-node-1),
        calc(40vw) calc(30vh) 0 var(--color-node-2),
        calc(85vw) calc(45vh) 0 var(--color-node-1),
        calc(15vw) calc(85vh) 0 var(--color-node-2),
        calc(60vw) calc(20vh) 0 var(--color-node-1),
        calc(30vw) calc(50vh) 0 var(--color-node-2),
        calc(50vw) calc(80vh) 0 var(--color-node-1),
        calc(10vw) calc(40vh) 0 var(--color-node-2);
    animation: float 20s ease-in-out infinite;
}

.bg-nodes::after {
    width: 6px;
    height: 6px;
    top: 25%;
    right: 15%;
    box-shadow:
        calc(-70vw) calc(20vh) 0 var(--color-node-2),
        calc(-30vw) calc(80vh) 0 var(--color-node-1),
        calc(-50vw) calc(40vh) 0 var(--color-node-2),
        calc(-80vw) calc(65vh) 0 var(--color-node-1),
        calc(-20vw) calc(35vh) 0 var(--color-node-2),
        calc(-60vw) calc(75vh) 0 var(--color-node-1),
        calc(-40vw) calc(15vh) 0 var(--color-node-2),
        calc(-75vw) calc(90vh) 0 var(--color-node-1);
    animation: float 25s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0);
    }
    25% {
        transform: translate(15px, -20px);
    }
    50% {
        transform: translate(-10px, 15px);
    }
    75% {
        transform: translate(20px, 10px);
    }
}

/* Layout */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 2rem;
}

.logo {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.logo .highlight {
    color: var(--color-primary);
}

.tagline {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--color-text-muted);
}

/* Cards */
.card {
    background: var(--color-card-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--border-radius);
    padding: 2rem 2.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

/* Subtle gradient accent on cards */
.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-card-accent), transparent);
}

/* Services Section */
.services h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 1rem;
}

.services p {
    color: var(--color-text-muted);
    font-size: 1rem;
    line-height: 1.7;
}

/* Contact Section */
.contact h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    text-align: center;
    margin-bottom: 1.5rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text);
}

.form-group input,
.form-group textarea {
    padding: 0.85rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-input-bg);
    color: var(--color-text);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-focus-ring);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Button */
.btn-primary {
    display: block;
    width: 100%;
    padding: 1rem;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.btn-primary:hover {
    background: var(--btn-hover);
}

.btn-primary:active {
    transform: scale(0.99);
}

/* Form Messages */
.form-message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
    text-align: center;
}

.form-message-success {
    background: rgba(74, 222, 128, 0.12);
    color: #4ade80;
    border: 1px solid rgba(74, 222, 128, 0.3);
}

.form-message-error {
    background: rgba(251, 113, 133, 0.12);
    color: #fb7185;
    border: 1px solid rgba(251, 113, 133, 0.3);
}

/* Button disabled state */
.btn-primary:disabled {
    background: var(--btn-disabled);
    cursor: not-allowed;
}

/* Footer */
.footer {
    text-align: center;
    padding-top: 1.5rem;
}

.footer p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* ========================================
   DAILY THEME ROTATIONS
   ======================================== */

/* Sunday - Deep Purple (Default) */
html.theme-sunday {
    --color-primary: #a78bfa;
    --color-bg: #0f0a1a;
    --color-card: #1a1225;
    --color-text: #f3f0ff;
    --color-text-muted: #a09cb5;
    --color-border: #2d2640;
    --color-glow-1: rgba(167, 139, 250, 0.35);
    --color-glow-2: rgba(139, 92, 246, 0.25);
    --color-glow-3: rgba(196, 181, 253, 0.2);
    --color-glow-4: rgba(124, 58, 237, 0.15);
    --color-grid: rgba(167, 139, 250, 0.08);
    --color-node-1: rgba(167, 139, 250, 0.4);
    --color-node-2: rgba(139, 92, 246, 0.35);
    --color-card-bg: rgba(26, 18, 37, 0.85);
    --color-card-accent: rgba(167, 139, 250, 0.3);
    --color-input-bg: #0f0a1a;
    --color-focus-ring: rgba(167, 139, 250, 0.25);
    --btn-hover: #b89dfc;
    --btn-disabled: #3d3550;
}

/* Monday - Steel Blue */
html.theme-monday {
    --color-primary: #60a5fa;
    --color-bg: #0a1628;
    --color-card: #0f1e32;
    --color-text: #f0f7ff;
    --color-text-muted: #94a8c2;
    --color-border: #1e3a5f;
    --color-glow-1: rgba(96, 165, 250, 0.35);
    --color-glow-2: rgba(59, 130, 246, 0.25);
    --color-glow-3: rgba(147, 197, 253, 0.2);
    --color-glow-4: rgba(37, 99, 235, 0.15);
    --color-grid: rgba(96, 165, 250, 0.08);
    --color-node-1: rgba(96, 165, 250, 0.4);
    --color-node-2: rgba(59, 130, 246, 0.35);
    --color-card-bg: rgba(15, 30, 50, 0.85);
    --color-card-accent: rgba(96, 165, 250, 0.3);
    --color-input-bg: #0a1628;
    --color-focus-ring: rgba(96, 165, 250, 0.25);
    --btn-hover: #7db8fc;
    --btn-disabled: #2a3f5f;
}

/* Tuesday - Emerald */
html.theme-tuesday {
    --color-primary: #34d399;
    --color-bg: #0a1a14;
    --color-card: #0f251c;
    --color-text: #ecfdf5;
    --color-text-muted: #86b5a2;
    --color-border: #1a4034;
    --color-glow-1: rgba(52, 211, 153, 0.35);
    --color-glow-2: rgba(16, 185, 129, 0.25);
    --color-glow-3: rgba(110, 231, 183, 0.2);
    --color-glow-4: rgba(5, 150, 105, 0.15);
    --color-grid: rgba(52, 211, 153, 0.08);
    --color-node-1: rgba(52, 211, 153, 0.4);
    --color-node-2: rgba(16, 185, 129, 0.35);
    --color-card-bg: rgba(15, 37, 28, 0.85);
    --color-card-accent: rgba(52, 211, 153, 0.3);
    --color-input-bg: #0a1a14;
    --color-focus-ring: rgba(52, 211, 153, 0.25);
    --btn-hover: #5ee0b0;
    --btn-disabled: #1f4035;
}

/* Wednesday - Amber Gold */
html.theme-wednesday {
    --color-primary: #fbbf24;
    --color-bg: #1a1408;
    --color-card: #251e0f;
    --color-text: #fefce8;
    --color-text-muted: #c9b88a;
    --color-border: #4a3f1a;
    --color-glow-1: rgba(251, 191, 36, 0.35);
    --color-glow-2: rgba(245, 158, 11, 0.25);
    --color-glow-3: rgba(252, 211, 77, 0.2);
    --color-glow-4: rgba(217, 119, 6, 0.15);
    --color-grid: rgba(251, 191, 36, 0.08);
    --color-node-1: rgba(251, 191, 36, 0.4);
    --color-node-2: rgba(245, 158, 11, 0.35);
    --color-card-bg: rgba(37, 30, 15, 0.85);
    --color-card-accent: rgba(251, 191, 36, 0.3);
    --color-input-bg: #1a1408;
    --color-focus-ring: rgba(251, 191, 36, 0.25);
    --btn-hover: #fcd34d;
    --btn-disabled: #4a4025;
}

/* Thursday - Rose Pink */
html.theme-thursday {
    --color-primary: #f472b6;
    --color-bg: #1a0a14;
    --color-card: #250f1c;
    --color-text: #fdf2f8;
    --color-text-muted: #c9a0b5;
    --color-border: #4a1a35;
    --color-glow-1: rgba(244, 114, 182, 0.35);
    --color-glow-2: rgba(236, 72, 153, 0.25);
    --color-glow-3: rgba(249, 168, 212, 0.2);
    --color-glow-4: rgba(219, 39, 119, 0.15);
    --color-grid: rgba(244, 114, 182, 0.08);
    --color-node-1: rgba(244, 114, 182, 0.4);
    --color-node-2: rgba(236, 72, 153, 0.35);
    --color-card-bg: rgba(37, 15, 28, 0.85);
    --color-card-accent: rgba(244, 114, 182, 0.3);
    --color-input-bg: #1a0a14;
    --color-focus-ring: rgba(244, 114, 182, 0.25);
    --btn-hover: #f9a8d4;
    --btn-disabled: #4a2540;
}

/* Friday - Cyan */
html.theme-friday {
    --color-primary: #22d3ee;
    --color-bg: #0a1a1a;
    --color-card: #0f2525;
    --color-text: #ecfeff;
    --color-text-muted: #86c2c9;
    --color-border: #1a4045;
    --color-glow-1: rgba(34, 211, 238, 0.35);
    --color-glow-2: rgba(6, 182, 212, 0.25);
    --color-glow-3: rgba(103, 232, 249, 0.2);
    --color-glow-4: rgba(8, 145, 178, 0.15);
    --color-grid: rgba(34, 211, 238, 0.08);
    --color-node-1: rgba(34, 211, 238, 0.4);
    --color-node-2: rgba(6, 182, 212, 0.35);
    --color-card-bg: rgba(15, 37, 37, 0.85);
    --color-card-accent: rgba(34, 211, 238, 0.3);
    --color-input-bg: #0a1a1a;
    --color-focus-ring: rgba(34, 211, 238, 0.25);
    --btn-hover: #5edef0;
    --btn-disabled: #1f4045;
}

/* Saturday - Orange */
html.theme-saturday {
    --color-primary: #fb923c;
    --color-bg: #1a1008;
    --color-card: #251a0f;
    --color-text: #fff7ed;
    --color-text-muted: #c9a88a;
    --color-border: #4a3018;
    --color-glow-1: rgba(251, 146, 60, 0.35);
    --color-glow-2: rgba(249, 115, 22, 0.25);
    --color-glow-3: rgba(253, 186, 116, 0.2);
    --color-glow-4: rgba(234, 88, 12, 0.15);
    --color-grid: rgba(251, 146, 60, 0.08);
    --color-node-1: rgba(251, 146, 60, 0.4);
    --color-node-2: rgba(249, 115, 22, 0.35);
    --color-card-bg: rgba(37, 26, 15, 0.85);
    --color-card-accent: rgba(251, 146, 60, 0.3);
    --color-input-bg: #1a1008;
    --color-focus-ring: rgba(251, 146, 60, 0.25);
    --btn-hover: #fdba74;
    --btn-disabled: #4a3525;
}

/* Mobile Responsive */
@media (max-width: 600px) {
    .container {
        padding: 2rem 1rem;
    }

    .logo {
        font-size: 1.75rem;
    }

    .tagline {
        font-size: 1rem;
    }

    .card {
        padding: 1.5rem;
    }

    .services h2,
    .contact h2 {
        font-size: 1.25rem;
    }
}