/*
 * C-HACK Main Stylesheet (v2.0 - Fully Responsive Enhanced)
 * Filename: main.css
 */

/* ----------------------------------------
 * CSS Variables (Design System)
 * ---------------------------------------- */
:root {
	--font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol', 'Noto Color Emoji';
	--font-family-heading: 'Poppins', var(--font-family-base);
	--color-primary: #007bff;
	--color-primary-dark: #0056b3;
	--color-secondary: #6c757d;
	--color-text: #e0e0e0;
	--color-text-muted: #adb5bd;
	--color-bg: #121212;
	--color-bg-surface: #1e1e1e;
	--color-border: #333;
	--color-danger: #dc3545;

	/* Fluid Spacing */
	--spacing-sm: clamp(0.5rem, 1.2vw, 0.75rem);
	--spacing-md: clamp(1rem, 2.5vw, 1.5rem);
	--spacing-lg: clamp(1.5rem, 4vw, 2rem);
	--spacing-xl: clamp(2.5rem, 8vw, 4rem);
	--spacing-xxl: clamp(4rem, 12vw, 6rem);

	--border-radius: 8px;
	--box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
	--transition-speed: 0.3s;
	--transition-ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ----------------------------------------
 * Reset & Base Styles
 * ---------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
	font-family: var(--font-family-base);
	line-height: 1.6;
	background-color: var(--color-bg);
	color: var(--color-text);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	overflow-x: hidden;
}
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition-speed) var(--transition-ease); }
a:hover { color: var(--color-primary-dark); }
h1, h2, h3, h4, h5, h6 {
	font-family: var(--font-family-heading);
	font-weight: 600;
	line-height: 1.2;
	margin-bottom: var(--spacing-md);
}
/* Fluid Typography */
h1 { font-size: clamp(2.5rem, 6vw, 3.5rem); }
h2 { font-size: clamp(1.8rem, 4.5vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3.5vw, 1.75rem); }
img { max-width: 100%; height: auto; display: block; }

/* ----------------------------------------
 * Page Transitions & Animations
 * ---------------------------------------- */
.page-transition-wrapper { transition: opacity 0.5s var(--transition-ease); }
body.is-transitioning .page-transition-wrapper { opacity: 0; }
.chapter-card, .grid-item-link {
	opacity: 0;
	transform: translateY(30px);
	transition: opacity 0.8s var(--transition-ease), transform 0.8s var(--transition-ease), box-shadow var(--transition-speed) var(--transition-ease);
}
.chapter-card.is-visible, .grid-item-link.is-visible {
	opacity: 1;
	transform: translateY(0);
}

/* ----------------------------------------
 * Layout
 * ---------------------------------------- */
#page-container { display: flex; flex-direction: column; min-height: 100vh; }
#content { flex: 1; padding: var(--spacing-lg); }
.header-inner, .footer-inner, .content-area {
	width: 100%;
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 var(--spacing-md);
}

/* ----------------------------------------
 * Header & Navigation
 * ---------------------------------------- */
.site-header {
	padding: var(--spacing-sm) 0;
	background-color: rgba(30, 30, 30, 0.8);
	backdrop-filter: blur(10px);
	position: sticky; top: 0; z-index: 1000;
	border-bottom: 1px solid var(--color-border);
}
.header-inner { display: flex; justify-content: space-between; align-items: center; }
.site-logo { font-size: 1.5rem; font-weight: 700; color: var(--color-text); letter-spacing: 1px; flex-shrink: 0; }
.main-navigation { display: none; align-items: center; justify-content: flex-end; flex-grow: 1; }
.main-navigation ul { display: flex; list-style: none; gap: var(--spacing-lg); }
.main-navigation a { color: var(--color-text-muted); font-weight: 500; }
.main-navigation a:hover { color: var(--color-text); }
.menu-extra { margin-left: var(--spacing-lg); }
.logout-link { background-color: var(--color-primary); color: #fff; padding: var(--spacing-sm) var(--spacing-md); border-radius: var(--border-radius); transition: background-color var(--transition-speed) var(--transition-ease); }
.logout-link:hover { background-color: var(--color-primary-dark); color: #fff; }
.hamburger-button { display: block; background: none; border: none; cursor: pointer; padding: 10px; z-index: 1010; }
.hamburger-line { display: block; width: 25px; height: 2px; background-color: var(--color-text); margin: 5px 0; transition: transform var(--transition-speed) var(--transition-ease), opacity var(--transition-speed) var(--transition-ease); }


/* ----------------------------------------
 * Footer
 * ---------------------------------------- */
.site-footer { padding: var(--spacing-lg) 0; background-color: var(--color-bg-surface); border-top: 1px solid var(--color-border); text-align: center; color: var(--color-text-muted); }


/* ----------------------------------------
 * Login Page
 * ---------------------------------------- */
.login-page-wrapper { display: flex; align-items: center; justify-content: center; min-height: calc(100vh - 160px); padding: var(--spacing-md); }
.login-container {
	width: 100%;
	max-width: 400px;
	padding: var(--spacing-lg);
	background-color: var(--color-bg-surface);
	border-radius: var(--border-radius);
	box-shadow: var(--box-shadow);
	text-align: center;
	border: 1px solid var(--color-border);
}
.login-logo { margin-bottom: var(--spacing-sm); font-size: 2.5rem; }
.login-message { margin-bottom: var(--spacing-lg); color: var(--color-text-muted); }
.login-error { background-color: rgba(220, 53, 69, 0.1); color: var(--color-danger); padding: var(--spacing-md); margin-bottom: var(--spacing-lg); border: 1px solid var(--color-danger); border-radius: var(--border-radius); }
#loginform label { display: block; text-align: left; margin-bottom: var(--spacing-sm); font-weight: 500; }
#loginform input[type="text"], #loginform input[type="password"] {
	width: 100%;
	padding: var(--spacing-md);
	margin-bottom: var(--spacing-lg);
	background-color: var(--color-bg);
	border: 1px solid var(--color-border);
	border-radius: var(--border-radius);
	color: var(--color-text);
	transition: border-color var(--transition-speed) var(--transition-ease), box-shadow var(--transition-speed) var(--transition-ease);
	font-size: 1rem;
}
#loginform input[type="text"]:focus, #loginform input[type="password"]:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25); }
#loginform .login-remember { text-align: left; margin-bottom: var(--spacing-lg); }
#loginform .wp-submit {
	width: 100%;
	background-color: var(--color-primary);
	color: #fff; border: none;
	padding: var(--spacing-md);
	font-size: 1rem;
	font-weight: 600;
	border-radius: var(--border-radius);
	cursor: pointer;
	transition: background-color var(--transition-speed) var(--transition-ease), transform var(--transition-speed) var(--transition-ease);
}
#loginform .wp-submit:hover { background-color: var(--color-primary-dark); transform: translateY(-2px); }
.lost-password-link { display: inline-block; margin-top: var(--spacing-lg); font-size: 0.9rem; color: var(--color-text-muted); }

/* ----------------------------------------
 * Archive Header
 * ---------------------------------------- */
.archive-header {
	padding: var(--spacing-xl) 0;
	margin-bottom: var(--spacing-xl);
	text-align: center;
	background: linear-gradient(135deg, rgba(30, 30, 30, 0.5), rgba(45, 45, 45, 0.8));
	border-bottom: 1px solid var(--color-border);
}
.archive-title { text-shadow: 0 2px 10px rgba(0,0,0,0.5); white-space: pre-line; }
.archive-subtitle { font-size: clamp(1rem, 3vw, 1.2rem); color: var(--color-text-muted); max-width: 600px; margin: 0 auto; white-space: pre-line; }
.back-to-chapters { display: inline-block; margin-top: var(--spacing-lg); color: var(--color-text-muted); }
.back-to-chapters:hover { color: var(--color-primary); }

/* ----------------------------------------
 * Chapter List & Content Grid
 * ---------------------------------------- */
.chapter-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: var(--spacing-lg); }
.chapter-card {
	background-color: var(--color-bg-surface);
	border: 1px solid var(--color-border);
	border-radius: var(--border-radius);
	overflow: hidden; display: block;
	color: var(--color-text);
}
.chapter-card:hover { transform: translateY(-10px); box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3); color: var(--color-text); }
.chapter-card-inner { padding: var(--spacing-lg) var(--spacing-md); }
.chapter-card-title { font-size: clamp(1.3rem, 4vw, 1.5rem); margin-bottom: var(--spacing-sm); color: var(--color-primary); white-space: pre-line; }
.chapter-card-description { color: var(--color-text-muted); margin-bottom: var(--spacing-lg); min-height: 4.8em; white-space: pre-line; }
.chapter-card-count { font-weight: bold; }
.chapter-card-cta { display: block; margin-top: var(--spacing-lg); font-weight: bold; color: var(--color-text); opacity: 0; transform: translateX(-20px); transition: opacity var(--transition-speed) var(--transition-ease), transform var(--transition-speed) var(--transition-ease); }
.chapter-card:hover .chapter-card-cta { opacity: 1; transform: translateX(0); }
.content-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--spacing-lg); }
.grid-item-title { font-size: clamp(1rem, 2.5vw, 1.1rem); margin: 0; line-height: 1.4; }

/* ----------------------------------------
 * Single Content Page
 * ---------------------------------------- */
.single-content-area { max-width: 900px; margin: 0 auto; }
.entry-content { white-space: pre-line; }
.video-container {
	position: relative;
	padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
	height: 0;
	overflow: hidden;
	margin-bottom: var(--spacing-lg);
	border-radius: var(--border-radius);
	background-color: #000;
}
.video-container iframe, .video-container video { position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0; }
.no-video-message { text-align: center; padding: var(--spacing-xl) 0; color: var(--color-text-muted); }
.content-navigation { display: flex; justify-content: space-between; margin-top: var(--spacing-xl); }

/* ----------------------------------------
 * Booking Page
 * ---------------------------------------- */
.booking-page-wrapper .content-area { max-width: 1400px; }
.booking-controls {
	margin-bottom: var(--spacing-lg);
	display: flex;
	align-items: center;
	gap: var(--spacing-md);
	flex-wrap: wrap;
}
.booking-controls label { font-size: 1.1rem; font-weight: 500; }
#teacher-select {
	background-color: var(--color-bg-surface);
	color: var(--color-text);
	border: 1px solid var(--color-border);
	border-radius: var(--border-radius);
	padding: var(--spacing-sm) var(--spacing-md);
	font-size: 1rem;
}
#booking-calendar-container { position: relative; background-color: var(--color-bg-surface); border: 1px solid var(--color-border); border-radius: var(--border-radius); padding: var(--spacing-md); overflow: hidden; }
.calendar-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--spacing-md); padding-bottom: var(--spacing-md); border-bottom: 1px solid var(--color-border); flex-wrap: wrap; gap: var(--spacing-sm); }
.calendar-nav-btn { background: none; border: 1px solid var(--color-border); color: var(--color-text-muted); padding: var(--spacing-sm) var(--spacing-md); border-radius: var(--border-radius); cursor: pointer; transition: all var(--transition-speed) var(--transition-ease); }
.calendar-nav-btn:hover { background-color: var(--color-primary); color: #fff; border-color: var(--color-primary); }
#current-week-display { font-size: clamp(1.1rem, 3.5vw, 1.5rem); font-weight: 600; text-align: center; flex-grow: 1; }
#booking-calendar-grid { display: flex; position: relative; min-height: 300px; overflow-x: auto; }
.calendar-time-labels { padding-top: 50px; }
.time-label { height: 96px; display: flex; align-items: flex-start; font-size: 0.9rem; color: var(--color-text-muted); padding-right: var(--spacing-md); }
.calendar-days-wrapper { display: grid; grid-template-columns: repeat(7, 1fr); flex-grow: 1; }
.calendar-day { border-left: 1px solid var(--color-border); min-width: 120px; }
.day-header { text-align: center; padding: var(--spacing-sm) 0; position: sticky; top: 0; background-color: var(--color-bg-surface); z-index: 10; height: 50px; }
.day-name { display: block; font-size: 0.8rem; }
.day-date { font-size: 1.2rem; font-weight: bold; }
.time-slot { height: 24px; border-top: 1px dotted var(--color-border); text-align: center; font-size: 1.1rem; color: var(--color-text-muted); user-select: none; }
.time-slot.available { color: var(--color-primary); cursor: pointer; transition: background-color var(--transition-speed) var(--transition-ease); }
.time-slot.available:hover { background-color: rgba(0, 123, 255, 0.2); }
.calendar-error { color: var(--color-danger); padding: var(--spacing-xl); }
.loading-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(30, 30, 30, 0.8); z-index: 20; display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--color-text); transition: opacity var(--transition-speed) var(--transition-ease); }
.spinner { width: 50px; height: 50px; border: 5px solid var(--color-border); border-top-color: var(--color-primary); border-radius: 50%; animation: spin 1s linear infinite; margin-bottom: var(--spacing-lg); }
@keyframes spin { to { transform: rotate(360deg); } }
.modal-wrapper { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 2000; display: flex; align-items: center; justify-content: center; padding: var(--spacing-md); }
.modal-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.7); backdrop-filter: blur(5px); }
.modal-content { position: relative; z-index: 1; background-color: var(--color-bg-surface); padding: var(--spacing-lg); border-radius: var(--border-radius); box-shadow: var(--box-shadow); width: 100%; max-width: 500px; border: 1px solid var(--color-border); transform: scale(0.9); opacity: 0; transition: transform var(--transition-speed) var(--transition-ease), opacity var(--transition-speed) var(--transition-ease); }
.modal-content.is-open { transform: scale(1); opacity: 1; }
.modal-close-btn { position: absolute; top: 10px; right: 15px; background: none; border: none; font-size: 2rem; color: var(--color-text-muted); cursor: pointer; }
#modal-title { margin-bottom: var(--spacing-lg); }
#modal-details { margin-bottom: var(--spacing-xl); font-size: 1.1rem; line-height: 1.8; }
.modal-actions { display: flex; justify-content: flex-end; gap: var(--spacing-md); }
.button-primary, .button-secondary { padding: var(--spacing-sm) var(--spacing-lg); border: none; border-radius: var(--border-radius); font-size: 1rem; cursor: pointer; transition: all var(--transition-speed) var(--transition-ease); }
.button-primary { background-color: var(--color-primary); color: #fff; }
.button-primary:hover { background-color: var(--color-primary-dark); }
.button-primary:disabled { background-color: var(--color-secondary); cursor: not-allowed; }
.button-secondary { background-color: var(--color-secondary); color: #fff; }
.button-secondary:hover { background-color: #5a6268; }


/* ----------------------------------------
 * Responsive - Level 1: Tablet (1024px)
 * ---------------------------------------- */
@media (min-width: 769px) {
	.main-navigation { display: flex !important; } /* Show nav on desktop */
}


/* ----------------------------------------
 * Responsive - Level 2: Mobile (768px)
 * ---------------------------------------- */
@media (max-width: 768px) {
	.main-navigation {
		position: fixed; top: 0; left: 0;
		width: 100%; height: 100vh;
		background-color: var(--color-bg-surface);
		display: flex; flex-direction: column;
		justify-content: center; align-items: center;
		transform: translateX(100%);
		transition: transform var(--transition-speed) var(--transition-ease);
		padding: var(--spacing-xl);
	}
	.main-navigation.is-open { transform: translateX(0); }
	.main-navigation ul { flex-direction: column; align-items: center; display: flex; }
	.main-navigation li a { font-size: 1.5rem; }
	.menu-extra { margin-left: 0; margin-top: var(--spacing-xl); display: block; }
	.hamburger-button.is-active .hamburger-line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
	.hamburger-button.is-active .hamburger-line:nth-child(2) { opacity: 0; }
	.hamburger-button.is-active .hamburger-line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

	.chapter-list, .content-grid {
		grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
		gap: var(--spacing-md);
	}

	.calendar-day { min-width: 100px; }
	.day-date { font-size: 1rem; }
}

/* ----------------------------------------
 * Responsive - Level 3: Small Mobile (480px)
 * ---------------------------------------- */
@media (max-width: 480px) {
	#content { padding: var(--spacing-md); }
	.header-inner, .footer-inner, .content-area { padding: 0 var(--spacing-sm); }
	
	.chapter-list, .content-grid {
		grid-template-columns: 1fr; /* Single column on very small screens */
	}

	.chapter-card-description { min-height: auto; }

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

	.modal-content {
		padding: var(--spacing-md);
	}
}