@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --border-color: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.05);
}

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

body {
    font-family: 'Inter', sans-serif;
    background: radial-gradient(circle at top left, #1e1b4b, var(--bg-primary));
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow-x: hidden;
}

/* Glassmorphism Card */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.6);
}

/* Typography */
h1, h2, h3 {
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.025em;
}

h1 {
    font-size: 2.5rem;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
    width: 100%;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

input[type="text"], input[type="password"] {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
    background: rgba(15, 23, 42, 0.8);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    width: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-color), #4f46e5);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(59, 130, 246, 0.39);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
    background: linear-gradient(135deg, var(--accent-hover), #4338ca);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    background: var(--danger);
    color: white;
}

.btn-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    background: var(--success);
    color: white;
}

/* Layout Specifics */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    width: 100%;
    padding: 2rem;
}

.auth-card {
    width: 100%;
    max-width: 400px;
}

.dashboard-container {
    width: 100%;
    max-width: 1200px;
    padding: 2rem;
    display: none; /* hidden until logged in */
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

/* Lists and Items */
.device-list {
    list-style: none;
    margin-top: 1rem;
}

.device-item {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s ease;
}

.device-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.device-info h3 {
    margin-bottom: 0.25rem;
    font-size: 1.1rem;
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge.connected { background: rgba(16, 185, 129, 0.2); color: var(--success); }
.badge.qr_ready { background: rgba(245, 158, 11, 0.2); color: var(--warning); }
.badge.disconnected { background: rgba(239, 68, 68, 0.2); color: var(--danger); }

.device-actions {
    display: flex;
    gap: 0.5rem;
}

.device-actions .btn {
    width: auto;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 1000;
}

.modal.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    border: 1px solid var(--border-color);
    transform: scale(0.95);
    transition: transform 0.3s ease;
    max-width: 400px;
    width: 90%;
}

.modal.active .modal-content {
    transform: scale(1);
}

#qr-image {
    width: 250px;
    height: 250px;
    background: white;
    padding: 10px;
    border-radius: 8px;
    margin: 1.5rem auto;
    display: none;
}

.loader {
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Navigation Tabs */
.nav-btn {
    background: transparent;
    color: var(--text-secondary);
    border: none;
    padding: 0.5rem 1rem;
    font-size: 1rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.nav-btn:hover {
    color: var(--text-primary);
}

.nav-btn.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

.tab-content {
    animation: fadeIn 0.3s ease;
}

.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    background: var(--glass-bg);
    border: 1px solid var(--border-color);
    color: white;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 9999;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}