/* ===================================
   Main CSS - Architect Prompts (Modern Light Theme)
   =================================== */

:root {
    /* Primary Colors - Vibrant & Modern */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #8b5cf6;
    --color-accent: #ec4899;

    /* Background Colors - Light & Clean */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-tertiary: #f1f5f9;
    --color-bg-hover: #e2e8f0;

    /* Text Colors */
    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-muted: #64748b;
    --color-text-light: #94a3b8;

    /* Border & Divider */
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

    /* Status Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-card: linear-gradient(135deg, rgba(102, 126, 234, 0.05) 0%, rgba(118, 75, 162, 0.05) 100%);
    --gradient-text: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.25rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 30px rgba(102, 126, 234, 0.3);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Monaco', 'Courier New', monospace;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

/* ===================================
   Reset & Base Styles
   =================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===================================
   Typography
   =================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
    letter-spacing: -0.025em;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--color-primary-dark);
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ===================================
   Layout
   =================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    font-size: 2.5rem;
    font-weight: 800;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ===================================
   Buttons
   =================================== */

.btn-primary,
.btn-secondary,
.btn-outline,
.btn-hero {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
    border: none;
    font-size: 1rem;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    border: 2px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-hover);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    padding: 0.625rem 1.5rem;
    box-shadow: none;
}

.btn-outline:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

.btn-hero {
    background: white;
    color: var(--color-primary);
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
    font-weight: 700;
    box-shadow: var(--shadow-xl);
}

.btn-hero:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-2xl);
}

.full-width {
    width: 100%;
}

/* ===================================
   Navigation
   =================================== */

.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-size: 1.375rem;
    font-weight: 800;
    color: var(--color-text-primary);
    letter-spacing: -0.025em;
}

.logo-icon {
    font-size: 1.75rem;
    filter: drop-shadow(0 2px 4px rgba(102, 126, 234, 0.3));
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    color: var(--color-text-secondary);
    font-weight: 500;
    transition: color var(--transition-base);
    font-size: 0.9375rem;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-primary);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-base);
    border-radius: 2px;
}

/* ===================================
   Forms
   =================================== */

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--color-text-primary);
    font-size: 0.9375rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
textarea,
select {
    width: 100%;
    padding: 0.875rem 1.125rem;
    background: var(--color-bg-primary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: all var(--transition-base);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

input::placeholder,
textarea::placeholder {
    color: var(--color-text-light);
}

/* ===================================
   Modal
   =================================== */

.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(5px);
    animation: fadeIn var(--transition-base);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background-color: var(--color-bg-primary);
    margin: 5% auto;
    padding: 2.5rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-2xl);
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: var(--shadow-2xl);
    animation: slideUp var(--transition-slow);
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-subtitle {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    font-size: 1.0625rem;
}

.close {
    color: var(--color-text-muted);
    position: absolute;
    right: 1.5rem;
    top: 1.5rem;
    font-size: 2rem;
    font-weight: 300;
    cursor: pointer;
    transition: color var(--transition-base);
    line-height: 1;
}

.close:hover {
    color: var(--color-text-primary);
}

/* ===================================
   Code Block
   =================================== */

.code-block {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin: var(--spacing-md) 0;
    position: relative;
}

.code-block pre {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.copy-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.5rem 1rem;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-base);
}

.copy-btn:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* ===================================
   Alert Messages
   =================================== */

.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid;
    background: var(--color-bg-primary);
}

.alert-success {
    border-color: var(--color-success);
    background: rgba(16, 185, 129, 0.05);
    color: #065f46;
}

.alert-error {
    border-color: var(--color-error);
    background: rgba(239, 68, 68, 0.05);
    color: #991b1b;
}

.alert-info {
    border-color: var(--color-info);
    background: rgba(59, 130, 246, 0.05);
    color: #1e40af;
}

.alert-warning {
    border-color: var(--color-warning);
    background: rgba(245, 158, 11, 0.05);
    color: #92400e;
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.5rem; }

    .section-title {
        font-size: 2rem;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .modal-content {
        width: 95%;
        padding: 1.5rem;
        margin: 10% auto;
    }

    .container {
        padding: 0 var(--spacing-md);
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }

    .btn-hero {
        padding: 1rem 1.5rem;
        font-size: 1rem;
    }

    .logo {
        font-size: 1.125rem;
    }
}