/* CSS Variables - Precise, Dark, Serious */
:root {
    --bg-deep: #050505;
    --bg-surface: #111111;
    --bg-surface-elevated: #1a1a1a;
    --text-primary: #ededed;
    --text-muted: #737373;
    --text-dark: #404040;
    --accent-blue: #0f52ba;
    
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 2rem;
    --space-xl: 4rem;
    --space-xxl: 8rem;
    
    --radius-sm: 2px;
    --radius-md: 4px;
}

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

html {
    scroll-behavior: smooth;
}

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

::selection {
    background-color: var(--accent-blue);
    color: #fff;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.container.narrow {
    max-width: 680px;
}

/* Typography elements */
h1, h2, h3 {
    font-weight: 500;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: var(--space-lg) var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(5, 5, 5, 0.9);
    backdrop-filter: blur(8px);
    z-index: 100;
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.05em;
}

.nav-brand {
    color: var(--text-muted);
}

.nav-divider {
    color: var(--text-dark);
    margin: 0 4px;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: var(--text-muted);
}

/* Sections Global */
.section {
    padding: var(--space-xxl) 0;
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dark);
    margin-bottom: var(--space-lg);
    letter-spacing: 0.1em;
}

/* Hero Section */
.hero-section {
    padding-top: 12rem;
}

.headline {
    font-size: clamp(2.5rem, 5vw, 4rem);
    max-width: 800px;
    margin-bottom: var(--space-lg);
}

.subtext {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin-bottom: var(--space-xl);
}

.mockup-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-xxl);
    border-top: 1px solid var(--bg-surface-elevated);
    padding-top: var(--space-lg);
}

.mockup-card {
    background: var(--bg-surface);
    padding: var(--space-lg);
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    border: 1px solid transparent;
}

.mockup-card.highlight {
    border-color: var(--bg-surface-elevated);
    background: #0a0a0a;
}

.mockup-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.mockup-value {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 500;
}

/* Buttons and CTAs */
.cta-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.cta-wrapper.aligned-left {
    align-items: flex-start;
    text-align: left;
    margin-top: var(--space-xl);
}

.btn {
    display: inline-block;
    padding: 0.875rem 1.5rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    text-decoration: none;
    line-height: 1;
}

.btn.primary {
    background-color: var(--text-primary);
    color: var(--bg-deep);
    border: 1px solid var(--text-primary);
}

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

.btn.secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--text-dark);
}

.btn.secondary:hover {
    border-color: var(--text-primary);
}

.cta-subtext {
    margin-top: var(--space-md);
    font-size: 0.875rem;
    color: var(--text-dark);
}

/* Text Sections */
.section-text {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    margin-bottom: var(--space-xl);
}

.structured-text p {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

/* Heera Section */
.heera-section {
    background-color: #030303;
    border-top: 1px solid var(--bg-surface);
    border-bottom: 1px solid var(--bg-surface);
}

.section-title {
    font-size: 2rem;
    margin-bottom: var(--space-xl);
}

.heera-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.heera-text {
    max-width: 680px;
}

.heera-text .explanation {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: var(--space-xl);
}

.heera-text .statement {
    font-size: 1.25rem;
    font-weight: 500;
    padding-left: var(--space-md);
    border-left: 2px solid var(--accent-blue);
}

.heera-ui-concept {
    background: var(--bg-surface);
    border: 1px solid var(--bg-surface-elevated);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
}

.ui-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--bg-surface-elevated);
    padding-bottom: var(--space-md);
    margin-bottom: var(--space-md);
}

.ui-header h3 {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.ui-status {
    font-size: 0.75rem;
    color: var(--accent-blue);
    display: flex;
    align-items: center;
    gap: 6px;
}

.ui-status::before {
    content: '';
    display: block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: var(--accent-blue);
}

.ui-list {
    list-style: none;
}

.ui-item {
    display: flex;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.ui-item.highlight {
    color: var(--text-primary);
    font-size: 1rem;
    padding-bottom: var(--space-md);
    margin-bottom: var(--space-sm);
    border-bottom: 1px dashed var(--text-dark);
}

/* Neelam Section */
.neelam-section {
    min-height: 60vh;
}

.construction-block {
    border: 1px dashed var(--text-dark);
    padding: var(--space-xl);
    border-radius: var(--radius-sm);
    background: repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 10px,
      rgba(255,255,255,0.01) 10px,
      rgba(255,255,255,0.01) 20px
    );
}

.construction-block .explanation {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: var(--space-xl);
}

.wireframe-status {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dark);
    padding: 6px 12px;
    background: var(--bg-surface);
    border: 1px solid var(--bg-surface-elevated);
}

.status-indicator {
    width: 4px;
    height: 4px;
    background-color: var(--text-dark);
    animation: blink 2s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--bg-surface);
    padding: var(--space-xl) 0;
    font-size: 0.875rem;
}

.flex-footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.footer-link {
    color: var(--text-primary);
    text-decoration: underline;
    text-underline-offset: 4px;
    margin-top: var(--space-sm);
    display: inline-block;
}

.footer-link:hover {
    color: var(--text-muted);
}

/* Pilot Status Block */
.pilot-status-block {
    display: inline-flex;
    flex-direction: column;
    gap: 4px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dark);
    margin-bottom: var(--space-xl);
    padding: var(--space-md);
    border: 1px dashed var(--text-dark);
    background: var(--bg-surface);
}

.pilot-status-label {
    color: var(--text-muted);
    margin-bottom: 4px;
}

/* System Diagram */
.system-diagram {
    margin-top: var(--space-xl);
    display: flex;
    flex-direction: row;
    align-items: stretch;
    gap: var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-muted);
    width: 100%;
}

.diagram-step {
    padding: var(--space-md);
    border: 1px solid var(--bg-surface-elevated);
    background: var(--bg-surface);
    border-radius: var(--radius-sm);
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.diagram-arrow {
    color: var(--text-dark);
    align-self: center;
}

/* Forms */
.form-container {
    max-width: 480px;
    margin-top: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.input-field {
    background: var(--bg-surface);
    border: 1px solid var(--bg-surface-elevated);
    color: var(--text-primary);
    padding: 0.875rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    border-radius: var(--radius-sm);
    transition: border-color 0.2s;
    outline: none;
}

.input-field:focus {
    border-color: var(--text-muted);
}

.input-with-prefix {
    display: flex;
    align-items: center;
    background: var(--bg-surface);
    border: 1px solid var(--bg-surface-elevated);
    border-radius: var(--radius-sm);
    transition: border-color 0.2s;
}

.input-with-prefix:focus-within {
    border-color: var(--text-muted);
}

.input-prefix {
    padding: 0.875rem 0.5rem 0.875rem 0.875rem;
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 1rem;
    user-select: none;
}

.prefixed-input {
    border: none;
    background: transparent;
    padding-left: 0.5rem;
    flex-grow: 1;
}

.prefixed-input:focus {
    border-color: transparent;
}

select.input-field {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23737373' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1em;
}

.full-width {
    width: 100%;
    margin-top: var(--space-md);
}

.form-success {
    margin-top: var(--space-lg);
    padding: var(--space-lg);
    border: 1px solid var(--accent-blue);
    background: rgba(15, 82, 186, 0.05);
    border-radius: var(--radius-sm);
}

.form-success p {
    margin-bottom: var(--space-sm);
}

.hidden {
    display: none !important;
}

.legal-note {
    font-size: 0.75rem;
    color: var(--text-dark);
    margin-top: var(--space-md);
    text-align: center;
    line-height: 1.4;
}

/* Founder Access Section */
.founder-access {
    margin-top: var(--space-xxl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--bg-surface-elevated);
    max-width: 480px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.subsection-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

.contact-buttons {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.inline-flex {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.icon-small {
    width: 1.125rem;
    height: 1.125rem;
}

/* Floating WhatsApp */
.floating-wa {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--bg-surface-elevated);
    padding: 12px 20px;
    border-radius: 30px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    z-index: 1000;
    transition: border-color 0.2s, transform 0.2s;
}

.floating-wa:hover {
    border-color: var(--text-muted);
    transform: translateY(-2px);
}

/* Animations - Simple fade up */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.8s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    :root {
        --space-xxl: 5rem;
        --space-xl: 3rem;
    }
    
    .container {
        padding: 0 1.5rem;
    }
    
    .headline {
        font-size: 2.5rem;
    }
    
    .system-diagram {
        flex-direction: column;
        align-items: center;
    }
    
    .diagram-step {
        width: 100%;
    }

    .diagram-arrow {
        transform: rotate(90deg);
        align-self: center;
        margin: var(--space-sm) 0;
    }
    
    .flex-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-lg);
    }
}