/* Modern Design System for Rick Alexander Website */

:root {
    /* Color Palette */
    --primary-color: #2c3e50;       /* Deep Blue/Grey */
    --primary-hover: #1a252f;
    --secondary-color: #e67e22;     /* Warm Orange for accents */
    --secondary-hover: #d35400;
    --background-color: #f8f9fa;    /* Light Grey */
    --surface-color: #ffffff;       /* White */
    --text-color: #333333;          /* Dark Grey */
    --text-light: #7f8c8d;          /* Medium Grey */
    --border-color: #e0e0e0;

    /* Typography */
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Lato', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
    min-width: 320px;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    line-height: 1.25;
    overflow-wrap: break-word;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    overflow-wrap: break-word;
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.3s ease;
    overflow-wrap: break-word;
}

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

/* Media (Images, Videos, Embeds) */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

iframe,
embed,
object,
video {
    max-width: 100%;
    box-sizing: border-box;
}

/* Responsive YouTube Embeds */
iframe[src*="youtube.com"],
iframe[src*="youtube-nocookie.com"] {
    width: 100% !important;
    max-width: 560px !important;
    aspect-ratio: 16 / 9;
    height: auto !important;
    border-radius: 8px;
    display: block;
}

/* Responsive Spotify and Music Embeds */
iframe[src*="spotify.com"] {
    max-width: 100% !important;
    border-radius: 12px;
}

iframe[src*="apple.com"] {
    max-width: 100% !important;
    border-radius: 12px;
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background-color: var(--surface-color);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
    position: relative;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: 0.5px;
    white-space: nowrap;
    transition: color 0.3s ease;
}

.logo:hover {
    color: var(--secondary-color);
}

/* Hidden Pure-CSS Checkbox */
.nav-toggle-checkbox {
    position: absolute;
    top: -9999px;
    left: -9999px;
    opacity: 0;
    width: 0;
    height: 0;
    pointer-events: none;
}

/* Desktop Navigation Links */
.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
}

.nav-links li {
    list-style: none;
}

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
    text-decoration: none;
    font-size: 1rem;
    padding: 0.4rem 0.2rem;
    position: relative;
    transition: color 0.25s ease;
}

.nav-links a:hover {
    color: var(--secondary-color);
}

.nav-links a.active {
    color: var(--secondary-color);
    font-weight: 700;
}

/* Nav Toggle Button (Hamburger) - hidden on desktop by default */
.nav-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border-color);
    cursor: pointer;
    padding: 8px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    border-radius: 6px;
    -webkit-tap-highlight-color: transparent;
    transition: background-color 0.2s ease, border-color 0.2s ease;
    user-select: none;
}

.nav-toggle:hover {
    background-color: rgba(0, 0, 0, 0.05);
    border-color: var(--secondary-color);
}

.nav-toggle:focus-visible {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

.hamburger-bar {
    display: block;
    width: 24px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.3s ease;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 200px;
    background-color: var(--primary-color);
    color: var(--surface-color);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    padding: 3rem 1rem;
}

.hero-content {
    z-index: 2;
    padding: var(--spacing-md);
    max-width: 800px;
}

.hero h1 {
    color: var(--surface-color);
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: var(--spacing-sm);
    line-height: 1.15;
}

.hero p {
    font-size: clamp(1.05rem, 2.5vw, 1.25rem);
    opacity: 0.9;
}

/* Main Content Grid */
.main-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
}

/* Cards */
.card {
    background-color: var(--surface-color);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.card img {
    border-radius: 4px;
    margin-bottom: var(--spacing-md);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--secondary-color);
    color: var(--surface-color);
    border-radius: 4px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    text-align: center;
    transition: background-color 0.3s ease, transform 0.15s ease;
    min-height: 44px;
    line-height: 1.4;
    text-decoration: none;
}

.btn:hover {
    background-color: var(--secondary-hover);
    color: var(--surface-color);
}

.btn:active {
    transform: scale(0.98);
}

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--surface-color);
    padding: var(--spacing-xl) 0;
    text-align: center;
    margin-top: var(--spacing-xl);
}

footer p {
    opacity: 0.75;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

footer a {
    color: var(--secondary-color);
}

/* ==========================================================================
   Responsive Breakpoints: Desktop Small & Tablet Landscape (861px to 1024px)
   ========================================================================== */
@media (min-width: 861px) and (max-width: 1024px) {
    .container {
        padding: 0 24px;
    }

    .nav-links {
        gap: 1.25rem;
    }

    .nav-links a {
        font-size: 0.95rem;
    }

    .main-content {
        gap: var(--spacing-lg);
        grid-template-columns: 1.8fr 1fr;
    }
}

/* ==========================================================================
   Responsive Breakpoints: Phone (All orientations) & Tablet Portrait (<= 860px)
   ========================================================================== */
@media (max-width: 860px) {
    .container {
        padding: 0 16px;
    }

    nav {
        position: static;
        padding: 0.85rem 0;
    }

    /* Unconditionally show the Hamburger button on mobile & tablet portrait */
    .nav-toggle {
        display: flex !important;
    }

    /* Transform hamburger into 'X' when checked OR when open class is applied */
    .nav-toggle-checkbox:checked ~ .nav-toggle .hamburger-bar:nth-child(1),
    .nav-toggle.open .hamburger-bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
        background-color: var(--secondary-color);
    }

    .nav-toggle-checkbox:checked ~ .nav-toggle .hamburger-bar:nth-child(2),
    .nav-toggle.open .hamburger-bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle-checkbox:checked ~ .nav-toggle .hamburger-bar:nth-child(3),
    .nav-toggle.open .hamburger-bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
        background-color: var(--secondary-color);
    }

    /* Mobile Dropdown Navigation Menu */
    .nav-links {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        width: 100%;
        background-color: var(--surface-color);
        box-shadow: 0 14px 28px rgba(0, 0, 0, 0.16);
        border-top: 1px solid var(--border-color);
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        visibility: hidden;
        transition: max-height 0.35s ease, opacity 0.25s ease, visibility 0.35s ease;
        z-index: 1001;
        gap: 0;
    }

    /* Open state when checkbox is checked OR class open is applied */
    .nav-toggle-checkbox:checked ~ .nav-links,
    .nav-links.open {
        max-height: 480px;
        opacity: 1;
        visibility: visible;
    }

    .nav-links li {
        width: 100%;
        border-bottom: 1px solid #eeeeee;
    }

    .nav-links li:last-child {
        border-bottom: none;
    }

    .nav-links a {
        display: block;
        padding: 0.95rem 1.25rem;
        font-size: 1.05rem;
        color: var(--text-color);
        transition: background-color 0.2s ease, color 0.2s ease, padding-left 0.2s ease;
    }

    .nav-links a:hover,
    .nav-links a:focus {
        background-color: #f8f9fa;
        color: var(--secondary-color);
        padding-left: 1.5rem;
    }

    .nav-links a.active {
        color: var(--secondary-color);
        font-weight: 700;
        background-color: rgba(230, 126, 34, 0.08);
        border-left: 4px solid var(--secondary-color);
    }

    /* Hero Section on Tablet/Mobile */
    .hero {
        min-height: 180px;
        padding: 2.5rem 1rem;
    }

    /* Main Content single column */
    .main-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        padding-top: var(--spacing-lg);
        padding-bottom: var(--spacing-lg);
    }

    /* Unfloat images on mobile with clean spacing below the banner */
    .page-photo,
    .intro [style*="float: left"],
    .intro [style*="float: right"] {
        float: none !important;
        margin: 1.5rem auto 1.5rem auto !important;
        text-align: center;
        display: flex;
        justify-content: center;
    }

    .intro [style*="float: left"] img,
    .intro [style*="float: right"] img {
        margin: 0 auto;
        max-width: 100% !important;
        height: auto !important;
    }

    /* Indented lists spacing */
    ul[style*="margin-left"] {
        margin-left: 1.25rem !important;
    }

    /* Action buttons wrapping (Sheet music page, PayPal buttons) */
    div[style*="display: flex; align-items: center; gap: 1rem;"] {
        flex-wrap: wrap;
        gap: 0.75rem !important;
    }

    footer {
        padding: var(--spacing-lg) 0;
        margin-top: var(--spacing-lg);
    }
}

/* ==========================================================================
   Responsive Breakpoints: Phone in Vertical Orientation (<= 480px)
   ========================================================================== */
@media (max-width: 480px) {
    .container {
        padding: 0 14px;
    }

    .logo {
        font-size: 1.3rem;
    }

    .hero {
        min-height: 150px;
        padding: 2rem 0.5rem;
    }

    .hero h1 {
        font-size: 1.9rem;
    }

    .hero p {
        font-size: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    .card {
        padding: 1.25rem 1rem;
    }

    /* Photos on mobile phone: ensure comfortable space below the banner */
    .page-photo,
    .intro [style*="float: left"],
    .intro [style*="float: right"] {
        margin-top: 1.5rem !important;
        margin-bottom: 1.5rem !important;
    }

    /* Action buttons on small phone screens */
    .btn {
        padding: 0.75rem 1.25rem;
        font-size: 0.85rem;
    }

    form .btn {
        width: 100%;
        max-width: 320px;
    }
}