/* Palette mappings sourced from sparrowhawk_blue_whiteback.png */
:root {
    --primary-dark: #1b4d5a;      /* Deep blue/teal tone from feathers */
    --secondary-blue: #2d7d9a;    /* Bright cyan-blue fill shade */
    --accent-orange: #f2a122;     /* Warm highlight accent from chest and beak */
    --bg-light: #f8f9fa;          /* Neutral base background */
    --card-bg: #ffffff;           /* Clean stark white for feature tiles */
    --text-dark: #24333c;         /* Readable, dark navy for prose text */
    --text-light: #ffffff;        /* High contrast light text */
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-light);
    line-height: 1.6;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
    text-align: center;
}

/* Header & Logo styling */
.hero {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--secondary-blue) 100%);
    color: var(--text-light);
    padding: 80px 0 60px 0;
    border-bottom: 6px solid var(--accent-orange);
}

.app-logo {
    max-width: 160px;
    height: auto;
    margin-bottom: 24px;
    background-color: transparent;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.tagline {
    font-size: 1.25rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Base section spacing */
section {
    padding: 70px 0;
}

h2 {
    font-size: 2.25rem;
    color: var(--primary-dark);
    margin-bottom: 35px;
}

h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--accent-orange);
    margin: 12px auto 0 auto;
    border-radius: 2px;
}

/* Feature grid patterns */
.about-app .description {
    max-width: 720px;
    margin: 0 auto 45px auto;
    font-size: 1.15rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 35px 25px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(27, 77, 90, 0.06);
    border-top: 4px solid var(--secondary-blue);
    transition: transform 0.2s ease;
}

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

.feature-card h3 {
    color: var(--primary-dark);
    margin-bottom: 16px;
    font-size: 1.35rem;
}

/* Profile specific layouts */
.about-developer {
    background-color: #f0f4f6;
}

.dev-profile {
    max-width: 720px;
    margin: 0 auto;
    font-size: 1.15rem;
}

/* Footer layout rules */
footer {
    background-color: var(--primary-dark);
    color: var(--text-light);
    padding: 24px 0;
    font-size: 0.95rem;
    border-top: 4px solid var(--accent-orange);
}