/*
   Sparrowhawk App Stylesheet
   Designed with Material 3 Principles
*/

:root {
    /* Color Palette - Updated to match the Sparrowhawk Logo */
    --primary-color: #0d6e81; /* Teal from the signal waves */
    --on-primary-color: #ffffff;
    --primary-container: #ecf3f4; /* Light teal tint */
    --on-primary-container: #001f25;

    --accent-color: #f7a221; /* Orange from the hawk's details */
    --on-accent-color: #3e2e00;

    --secondary-color: #2b4562; /* Dark blue from the hawk's body */
    --on-secondary-color: #ffffff;

    --background-color: #fdfcff;
    --on-background-color: #1a1c1e;

    --surface-color: #fdfcff;
    --on-surface-color: #1a1c1e;
    --surface-variant: #dfe4e6;
    --on-surface-variant: #40484b;

    /* Typography */
    --font-heading: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-body: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

    /* Spacing & Radii */
    --radius-large: 28px;
    --radius-medium: 16px;
    --spacing-unit: 8px;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--background-color);
    color: var(--on-background-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Layout Containers */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 calc(var(--spacing-unit) * 3);
}

.main-content-wrapper {
    display: flex;
    gap: calc(var(--spacing-unit) * 6);
    margin-top: calc(var(--spacing-unit) * 6);
}

.primary-content {
    flex: 3;
}

.sidebar {
    flex: 1;
    min-width: 300px;
}

.sidebar-card {
    background-color: var(--surface-variant);
    padding: calc(var(--spacing-unit) * 4);
    border-radius: var(--radius-medium);
    position: sticky;
    top: 100px;
}

.release-item {
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.release-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.release-version {
    font-weight: 700;
    color: var(--primary-color);
    display: block;
}

.release-date {
    font-size: 0.8rem;
    color: var(--on-surface-variant);
    display: block;
    margin-bottom: 8px;
}

.release-notes {
    padding-left: 20px;
    font-size: 0.9rem;
}

.release-notes li {
    margin-bottom: 4px;
}

section {
    padding: calc(var(--spacing-unit) * 10) 0;
}

/* Header & Nav */
header {
    padding: calc(var(--spacing-unit) * 3) 0;
    background-color: var(--background-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 32px;
}

/* Hero Section */
.hero {
    text-align: center;
    background-color: var(--secondary-color);
    color: var(--on-secondary-color);
    border-radius: 0 0 var(--radius-large) var(--radius-large);
    padding: calc(var(--spacing-unit) * 12) 0;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: calc(var(--spacing-unit) * 2);
    color: var(--accent-color);
}

.hero p {
    font-size: 1.25rem;
    max-width: 600px;
    margin: 0 auto calc(var(--spacing-unit) * 5);
    opacity: 0.9;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--on-primary-color);
    padding: 12px 24px;
    border-radius: 100px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
    display: inline-block;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: calc(var(--spacing-unit) * 4);
    margin-top: calc(var(--spacing-unit) * 6);
}

.feature-card {
    background-color: var(--surface-variant);
    padding: calc(var(--spacing-unit) * 4);
    border-radius: var(--radius-medium);
    transition: transform 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
}

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: 12px;
}

/* Developer Section */
.developer-section {
    background-color: var(--primary-color);
    color: var(--on-primary-color);
    border-radius: var(--radius-large);
    margin: calc(var(--spacing-unit) * 4) 0;
}

.developer-content {
    display: flex;
    align-items: center;
    gap: calc(var(--spacing-unit) * 6);
    flex-wrap: wrap;
    padding: calc(var(--spacing-unit) * 6);
}

.dev-text {
    flex: 1;
    min-width: 300px;
}

.dev-text h2 {
    margin-bottom: 16px;
    font-size: 2rem;
}

/* Footer */
footer {
    text-align: center;
    padding: calc(var(--spacing-unit) * 6) 0;
    border-top: 1px solid var(--surface-variant);
    color: var(--on-surface-variant);
    font-size: 0.9rem;
}

/* Responsive Adjustments */
@media (max-width: 1024px) {
    .main-content-wrapper {
        flex-direction: column;
    }

    .sidebar-card {
        position: static;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero {
        padding: calc(var(--spacing-unit) * 8) 0;
    }

    .developer-content {
        text-align: center;
        flex-direction: column;
        padding: calc(var(--spacing-unit) * 4);
    }

    .dev-text {
        min-width: unset;
        width: 100%;
    }
}