/* ==========================================================================
   Design System - Light Black & White Theme (Dark Mode)
   ========================================================================== */
:root {
    --bg-main: #1A1A1A;             /* Crisp Light Black / Dark Gray */
    --bg-card: #2C2C2C;             /* Elevated Surface */
    --bg-input: #3A3A3A;            /* Input Backgrounds */
    --text-main: #FFFFFF;           /* Pure White */
    --text-muted: #A0A0A0;          /* Soft Gray */
    --gold-accent: #B8860B;         /* Goldenrod for Buttons & Key Icons */
    --gold-glow: rgba(184, 134, 11, 0.3);
    --border-color: rgba(255, 255, 255, 0.08);
    --font-primary: 'Outfit', sans-serif;
    --bottom-nav-height: 70px;
    --transition-speed: 0.3s;
    
    /* Deep shadows for dark elements */
    --shadow-deep: 0 8px 30px rgba(0, 0, 0, 0.6);
}

/* ==========================================================================
   Global Reset
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-primary);
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    overflow-x: hidden;
    min-height: 100vh;
}

::-webkit-scrollbar {
    width: 4px;
}
::-webkit-scrollbar-thumb {
    background: var(--gold-accent);
    border-radius: 10px;
}

/* ==========================================================================
   App Layout & Screens
   ========================================================================== */
#app {
    position: relative;
    padding-bottom: var(--bottom-nav-height);
    min-height: 100vh;
}

#mainContent {
    padding: 20px;
}

.screen {
    display: none;
    animation: fadeIn 0.4s ease-out forwards;
}
.screen.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Typography & Shared Elements
   ========================================================================== */
.page-title {
    margin-bottom: 25px;
}
.page-title.with-back {
    display: flex;
    align-items: center;
    gap: 15px;
}
.back-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.3);
    transition: var(--transition-speed);
}
.back-btn:active {
    background: var(--bg-input);
    transform: scale(0.95);
}

.page-title h2 {
    color: var(--text-main);
    font-size: 1.8rem;
    font-weight: 700;
}
.page-title p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.gold-text {
    color: var(--gold-accent);
}

/* Buttons */
.gold-btn {
    background: linear-gradient(135deg, #FFD700 0%, #B8860B 100%);
    color: #000;
    border: none;
    padding: 14px 28px;
    border-radius: 25px;
    font-size: 1.05rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-speed);
    box-shadow: 0 4px 15px var(--gold-glow);
}
.gold-btn:hover, .gold-btn:active {
    box-shadow: 0 6px 20px rgba(184, 134, 11, 0.6);
    transform: scale(1.02);
}

.gold-outline-btn {
    background: var(--bg-card);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    padding: 10px 18px;
    border-radius: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-speed);
}
.gold-outline-btn:active, .gold-outline-btn.selected {
    border-color: var(--gold-accent);
    color: var(--gold-accent);
    box-shadow: 0 0 10px var(--gold-glow);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 0.95rem;
}
.w-100 {
    width: 100%;
}

/* Forms */
.form-container {
    padding: 25px 20px;
}
.input-group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
}
.input-group label {
    margin-bottom: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
}
.input-group input, .input-group textarea, .input-group select {
    background-color: var(--bg-input);
    border: 1px solid var(--border-color);
    padding: 14px;
    border-radius: 12px;
    color: var(--text-main);
    outline: none;
    font-size: 1rem;
    transition: var(--transition-speed);
}
.input-group input:focus, .input-group textarea:focus, .input-group select:focus {
    border-color: var(--gold-accent);
    box-shadow: 0 0 10px var(--gold-glow);
}

/* Cards */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-deep);
}

/* ==========================================================================
   Home Screen Specifics
   ========================================================================== */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}
.greeting {
    font-size: 0.95rem;
    color: var(--gold-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
}
.user-name {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-main);
}

.banner {
    background: linear-gradient(to right, rgba(0,0,0,0.8), rgba(0,0,0,0.4)), url('https://images.unsplash.com/photo-1590129841857-4b77fbaa4b34?auto=format&fit=crop&q=80&w=800') center/cover;
    border-radius: 20px;
    padding: 30px 20px;
    position: relative;
    border: 1px solid var(--border-color);
    margin-bottom: 30px;
    box-shadow: var(--shadow-deep);
}
.banner-content h2 {
    font-size: 1.5rem;
    margin-bottom: 8px;
    color: var(--text-main);
    font-weight: 800;
}
.banner-content p {
    font-size: 0.95rem;
    margin-bottom: 15px;
    color: var(--text-muted);
}

.quick-access-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}
.qty-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 22px 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: var(--transition-speed);
}
.qty-card:active {
    background-color: var(--bg-input);
    transform: translateY(2px);
}
.qty-card span {
    font-weight: 600;
    color: var(--text-main); /* White Labels */
    font-size: 1.05rem;
}
.gold-icon {
    color: var(--gold-accent);
    font-size: 2rem;
}

/* ==========================================================================
   Prayer Screen
   ========================================================================== */
.salah-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 20px;
    margin-bottom: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: var(--transition-speed);
}
.salah-card.active-salah {
    border-color: var(--gold-accent);
    box-shadow: 0 0 20px var(--gold-glow);
    background: linear-gradient(145deg, var(--bg-input), var(--bg-card));
}

.salah-info {
    display: flex;
    align-items: center;
    gap: 15px;
}
.salah-icon-box {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background-color: rgba(184, 134, 11, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold-accent);
    font-size: 1.4rem;
}
.salah-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-main); 
}
.salah-status-badge {
    font-size: 0.75rem;
    background: var(--gold-accent);
    color: #000;
    padding: 3px 10px;
    border-radius: 12px;
    font-weight: bold;
    display: none;
}
.salah-card.active-salah .salah-status-badge {
    display: inline-block;
}

.timing-col {
    text-align: right;
}
.timing-col p {
    font-size: 0.85rem;
    color: var(--text-muted);
}
.timing-col strong {
    color: var(--text-main);
    font-size: 1.1rem;
    font-weight: 800;
}

/* ==========================================================================
   Events / Knowledge Screen
   ========================================================================== */
.tabs {
    display: flex;
    gap: 10px;
    margin: 15px 0 20px 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}
.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    padding: 10px 5px;
    transition: var(--transition-speed);
}
.tab-btn.active {
    color: var(--text-main);
    border-bottom: 2px solid var(--text-main);
}
.tab-content p {
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 15px;
    color: var(--text-muted);
}

.program-card {
    display: flex;
    align-items: center;
    gap: 15px;
    background: var(--bg-card);
    padding: 18px;
    border-radius: 18px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    cursor: pointer;
}
.program-card:active {
    background: var(--bg-input);
}
.program-card .icon-wrap {
    color: #FF0000;
    font-size: 2rem;
}
.program-card h4 {
    color: var(--text-main);
    font-weight: 600;
}
.golden-link {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* ==========================================================================
   Donation System Details (New)
   ========================================================================== */
.donation-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}
.amount-btn {
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-main);
    padding: 15px 0;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    transition: 0.2s;
}
.amount-btn.active {
    border-color: var(--gold-accent);
    background: rgba(184, 134, 11, 0.1);
    color: var(--gold-accent);
    box-shadow: 0 0 10px var(--gold-glow);
}

/* Mock Payment Processing Modal */
.payment-modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100vh;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(5px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: 0.3s;
}
.payment-modal.open {
    opacity: 1;
    visibility: visible;
}
.payment-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: 20px;
    width: 90%;
    max-width: 400px;
    text-align: center;
    box-shadow: var(--shadow-deep);
}
.spinner {
    border: 4px solid rgba(255,255,255,0.1);
    border-top: 4px solid var(--gold-accent);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px auto;
}
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

.receipt-icon {
    font-size: 4rem;
    color: #4CAF50;
    margin-bottom: 15px;
    display: none;
}
.payment-modal.success .spinner { display: none; }
.payment-modal.success .receipt-icon { display: block; margin: 0 auto 15px auto;}

/* ==========================================================================
   AI Tutor Chat overlay
   ========================================================================== */
#aiTutorFAB {
    position: fixed;
    bottom: calc(var(--bottom-nav-height) + 20px);
    right: 20px;
    width: 65px;
    height: 65px;
    border-radius: 50%;
    background: linear-gradient(135deg, #FFD700 0%, #B8860B 100%);
    color: #000;
    border: none;
    font-size: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 20px var(--gold-glow);
    cursor: pointer;
    z-index: 99;
}

.chat-overlay {
    position: fixed;
    top: 100%;
    left: 0;
    width: 100%;
    height: calc(100vh - var(--bottom-nav-height));
    background-color: var(--bg-main);
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: top 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.chat-overlay.open {
    top: 0;
}

.chat-header {
    background: var(--bg-card);
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}
.chat-header span {
    font-weight: 700;
    font-size: 1.3rem;
    margin-left: 10px;
    color: var(--text-main);
}
.close-chat {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 2rem;
    cursor: pointer;
}

.chat-body {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
    background-color: var(--bg-main);
}

.message {
    max-width: 80%;
    padding: 14px 18px;
    border-radius: 20px;
    font-size: 1rem;
    line-height: 1.5;
    position: relative;
}
.ai-msg {
    align-self: flex-start;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-top-left-radius: 4px;
    color: var(--text-main);
}
.user-msg {
    align-self: flex-end;
    background-color: var(--gold-accent);
    color: #000;
    font-weight: 600;
    border-top-right-radius: 4px;
}

.chat-footer {
    padding: 20px;
    background: var(--bg-card);
    display: flex;
    gap: 12px;
    border-top: 1px solid var(--border-color);
}
.chat-footer input {
    flex: 1;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 25px;
    padding: 0 20px;
    color: var(--text-main);
    outline: none;
    font-size: 1rem;
}
.chat-footer button {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gold-accent);
    border: none;
    color: #000;
    font-size: 1.4rem;
    cursor: pointer;
    flex-shrink: 0;
}

/* ==========================================================================
   Bottom Navigation
   ========================================================================== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: var(--bottom-nav-height);
    background-color: var(--bg-card);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 50;
    padding-bottom: env(safe-area-inset-bottom);
}
.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--text-muted);
    width: 20%;
    height: 100%;
    transition: var(--transition-speed);
}
.nav-item i {
    font-size: 1.4rem;
    margin-bottom: 4px;
}
.nav-item span {
    font-size: 0.8rem;
    font-weight: 600;
}
.nav-item.active {
    color: var(--text-main); /* White for active tab instead of gold */
}
.nav-item.active i {
    transform: translateY(-4px);
    color: var(--text-main);
}