/* ==========================================================================
   Modern Premium Dark Theme for Qubit x Store
   ========================================================================== */

:root {
    --bg-color: #211414;
    --surface-color: rgba(61, 28, 28, 0.6);
    --surface-border: rgba(255, 255, 255, 0.08);
    --primary-gradient: linear-gradient(135deg, #e06666 0%, #cd5c5c 100%);
    --primary-color: #cd5c5c;
    --primary-hover: #b84f4f;
    --primary-shadow: rgba(205, 92, 92, 0.25);
    --primary-shadow-hover: rgba(205, 92, 92, 0.4);
    --primary-focus: rgba(205, 92, 92, 0.2);
    --primary-light-bg: rgba(205, 92, 92, 0.15);
    --primary-light-text: #e06666;
    --text-main: #fdf4f4;
    --text-muted: #e0c2c2;
    --error-color: #ef4444;
    --error-bg: rgba(239, 68, 68, 0.1);
    --bg-glass: rgba(33, 20, 20, 0.7);
    --bg-glass-input: rgba(33, 20, 20, 0.5);
    --bg-glass-input-focus: rgba(33, 20, 20, 0.8);
    --bg-glass-card: rgba(33, 20, 20, 0.4);
    --bg-glass-card-hover: rgba(33, 20, 20, 0.6);
    --bg-radial-1: rgba(205, 92, 92, 0.15);
    --bg-radial-2: rgba(224, 102, 102, 0.15);
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

body.shrek-theme {
    --bg-color: #2b1f15;
    --surface-color: rgba(60, 40, 20, 0.6);
    --primary-gradient: linear-gradient(135deg, #4ade80 0%, #16a34a 100%);
    --primary-color: #22c55e;
    --primary-hover: #16a34a;
    --primary-shadow: rgba(34, 197, 94, 0.25);
    --primary-shadow-hover: rgba(34, 197, 94, 0.4);
    --primary-focus: rgba(34, 197, 94, 0.2);
    --primary-light-bg: rgba(34, 197, 94, 0.15);
    --primary-light-text: #4ade80;
    --text-main: #f4fdf4;
    --text-muted: #c2e0c2;
    --bg-glass: rgba(43, 31, 21, 0.7);
    --bg-glass-input: rgba(43, 31, 21, 0.5);
    --bg-glass-input-focus: rgba(43, 31, 21, 0.8);
    --bg-glass-card: rgba(43, 31, 21, 0.4);
    --bg-glass-card-hover: rgba(43, 31, 21, 0.6);
    --bg-radial-1: rgba(34, 197, 94, 0.15);
    --bg-radial-2: rgba(139, 69, 19, 0.15);
}

body {
    margin: 0;
    background-color: var(--bg-color);
    background-image:
        radial-gradient(circle at 15% 50%, var(--bg-radial-1), transparent 25%),
        radial-gradient(circle at 85% 30%, var(--bg-radial-2), transparent 25%);
    background-attachment: fixed;
    color: var(--text-main);
    font-family: var(--font-sans);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* --- Layout --- */

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 32px;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--surface-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

main {
    max-width: 1100px;
    margin: 40px auto;
    padding: 0 24px;
}

/* --- Typography --- */

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

.brand-logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-heading {
    margin-bottom: 32px;
}

.page-heading p {
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin: 0 0 8px 0;
}

.page-heading h1 {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: 0;
    color: var(--text-main);
}

/* --- Navigation --- */

nav {
    display: flex;
    gap: 16px;
    align-items: center;
}

nav a,
nav button {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    cursor: pointer;
}

nav a:hover,
nav button:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

nav form {
    margin: 0;
}

/* --- Forms & Buttons --- */

button,
.btn-primary,
.button {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px var(--primary-shadow);
    text-decoration: none;
}

button:hover,
.btn-primary:hover,
.button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--primary-shadow-hover);
}

button:active,
.btn-primary:active,
.button:active {
    transform: translateY(0);
}

input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-glass-input);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    box-sizing: border-box;
    transition: all 0.2s ease;
}

input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-focus);
    background: var(--bg-glass-input-focus);
}

input::placeholder {
    color: rgba(148, 163, 184, 0.5);
}

/* --- Glass Panels (Cards) --- */

.glass-panel,
.card,
.cart-item,
.cart-total,
.recommendations,
.empty-state,
.chatbox {
    background: var(--surface-color);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* --- Login Page --- */

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 180px);
}

.login-card {
    width: 100%;
    max-width: 420px;
    padding: 40px;
    border-radius: var(--radius-xl);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-header h1 {
    font-size: 2rem;
    font-weight: 800;
    margin: 0 0 8px 0;
}

.login-header p {
    color: var(--text-muted);
    margin: 0;
}

.input-group {
    margin-bottom: 20px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-muted);
}

.login-form button {
    width: 100%;
    margin-top: 12px;
    padding: 14px;
}

.error-message {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--error-bg);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--error-color);
    padding: 12px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 24px;
    font-size: 0.9rem;
    font-weight: 500;
}

.error-message p {
    margin: 0;
}

/* --- Products Grid --- */

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

.card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3), 0 0 0 1px var(--primary-color);
    border-color: transparent;
}

.card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-bottom: 1px solid var(--surface-border);
}

.card-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.card h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 8px 0;
}

.price {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    margin: 0 0 24px 0;
    display: flex;
    align-items: center;
}

.price::before {
    content: 'Rs.';
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-right: 6px;
}

.card form {
    margin-top: auto;
}

.card button {
    width: 100%;
}

/* --- Cart --- */

.cart {
    display: grid;
    gap: 24px;
}

.cart-row {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 24px;
}

@media (max-width: 900px) {
    .cart-row {
        grid-template-columns: 1fr;
    }
}

.cart-item {
    display: flex;
    padding: 20px;
    gap: 24px;
    align-items: center;
}

.cart-item img {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-md);
    object-fit: cover;
}

.cart-details {
    flex: 1;
}

.cart-details h2 {
    font-size: 1.25rem;
    margin: 0 0 12px 0;
}

.cart-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.cart-meta span {
    background: var(--primary-light-bg);
    color: var(--primary-light-text);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.cart-meta strong {
    font-size: 1.1rem;
}

.cart-item button {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    box-shadow: none;
    padding: 8px 16px;
    font-size: 0.85rem;
}

.cart-item button:hover {
    background: rgba(239, 68, 68, 0.2);
    box-shadow: none;
}

.recommendations {
    padding: 24px;
}

.recommendations h3 {
    margin: 0 0 16px 0;
    font-size: 1.1rem;
    color: var(--text-muted);
}

.recommendation-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.recommendation-card {
    background: var(--bg-glass-card);
    border: 1px solid var(--surface-border);
    border-radius: var(--radius-md);
    padding: 12px;
    text-align: center;
    transition: transform 0.2s ease;
}

.recommendation-card:hover {
    transform: translateY(-2px);
    background: var(--bg-glass-card-hover);
}

.recommendation-card img {
    width: 100%;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
}

.recommendation-card p {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 500;
}

.cart-total {
    padding: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 8px;
    background: linear-gradient(to right, var(--surface-color), var(--primary-light-bg));
}

.cart-total div p {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 4px 0;
    font-weight: 600;
}

.cart-total h2 {
    font-size: 2rem;
    margin: 0;
    color: var(--text-main);
}

.cart-total form button {
    padding: 12px 24px;
    font-size: 1rem;
}

.empty-state {
    padding: 60px 24px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.empty-state h2 {
    margin: 0;
    font-size: 1.75rem;
}

.empty-state p {
    color: var(--text-muted);
    margin: 0 0 16px 0;
}

/* --- Chatbot (Shrek AI) --- */

.chatbox {
    max-width: 500px;
    margin: 0 auto;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 600px;
}

.chathead {
    background: var(--primary-light-bg);
    border-bottom: 1px solid var(--primary-focus);
    padding: 16px;
    text-align: center;
    font-weight: 700;
    color: var(--primary-light-text);
    margin: 0;
}

.chatbody {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background: var(--bg-glass-card);
}

@media (max-width: 600px) {
    .cart-item {
        flex-direction: column;
        text-align: center;
    }

    .cart-meta {
        justify-content: center;
    }

    .cart-total {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}