/* ========== RESET & VARIABLES ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #25D366;
    --primary-dark: #128C7E;
    --secondary-color: #075E54;
    --danger-color: #DC3545;
    --warning-color: #FFC107;
    --success-color: #28A745;
    --dark-bg: #0A1014;
    --card-bg: #1A1F26;
    --card-hover: #222830;
    --border-color: #2D3440;
    --text-primary: #FFFFFF;
    --text-secondary: #B0B3B8;
    --text-muted: #8A8D91;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, var(--dark-bg) 0%, #151922 100%);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
}

/* ========== MAIN CONTAINER ========== */
.main-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    flex: 1;
}

/* ========== HERO SECTION ========== */
.hero-section {
    text-align: center;
    margin-bottom: 40px;
    animation: fadeInDown 0.6s ease;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-container {
    margin-bottom: 24px;
}

.logo-container i {
    font-size: 80px;
    color: var(--primary-color);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.05);
        opacity: 0.9;
    }
}

.hero-section h1 {
    font-size: 42px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 12px;
}

.hero-section p {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* ========== SESSION CARD ========== */
.session-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.6s ease 0.2s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.card-header i {
    font-size: 28px;
    color: var(--primary-color);
}

.card-header h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
}

/* ========== CONNECT DESCRIPTION ========== */
.connect-description {
    margin-bottom: 32px;
    text-align: center;
}

.connect-description p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========== INPUT GROUP ========== */
.input-group {
    margin-bottom: 24px;
}

.input-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.input-group label i {
    color: var(--primary-color);
    font-size: 16px;
}

.name-input {
    width: 100%;
    padding: 16px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 16px;
    transition: all 0.3s ease;
    font-family: inherit;
}

.name-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 4px rgba(37, 211, 102, 0.1);
}

.name-input::placeholder {
    color: var(--text-muted);
}

/* ========== BUTTONS ========== */
.connect-btn {
    width: 100%;
    padding: 18px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    border-radius: 12px;
    color: white;
    font-size: 18px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}

.connect-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
}

.connect-btn:active:not(:disabled) {
    transform: translateY(0);
}

.connect-btn:disabled,
.connect-btn.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
    background: linear-gradient(135deg, #666, #555);
    box-shadow: none;
}

.btn {
    padding: 14px 24px;
    border: none;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
}

/* ========== SESSION STATUS INFO ========== */
.session-status-info {
    margin-top: 24px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 8px;
}

.status-badge.connected {
    background: rgba(40, 167, 69, 0.2);
    color: var(--success-color);
}

.status-badge.disconnected {
    background: rgba(220, 53, 69, 0.2);
    color: var(--danger-color);
}

.status-badge.connecting {
    background: rgba(255, 193, 7, 0.2);
    color: var(--warning-color);
}

.status-details {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* ========== QR SECTION ========== */
.qr-section {
    margin-top: 40px;
    animation: fadeInUp 0.6s ease;
}

.qr-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
}

.qr-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.qr-header h3 {
    font-size: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-primary);
}

.session-badge {
    padding: 8px 20px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 20px;
    font-size: 14px;
    font-weight: 700;
    color: white;
}

.qr-container {
    background: white;
    border-radius: 16px;
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    margin-bottom: 32px;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.1);
}

.qr-loading {
    text-align: center;
}

.qr-loading i {
    font-size: 60px;
    color: var(--primary-color);
    margin-bottom: 20px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.qr-loading p {
    font-size: 18px;
    color: #333;
    font-weight: 600;
    margin-bottom: 8px;
}

.qr-loading small {
    font-size: 14px;
    color: #666;
}

#qr-image {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ========== INSTRUCTIONS ========== */
.qr-instructions {
    background: rgba(37, 211, 102, 0.1);
    border: 1px solid rgba(37, 211, 102, 0.3);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
}

.qr-instructions h4 {
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.qr-instructions ol {
    margin-left: 24px;
    color: var(--text-secondary);
}

.qr-instructions li {
    margin-bottom: 10px;
    line-height: 1.6;
}

.qr-instructions strong {
    color: var(--text-primary);
}

/* ========== QR ACTIONS ========== */
.qr-actions {
    display: flex;
    gap: 12px;
}

.qr-actions .btn {
    flex: 1;
}

/* ========== SUCCESS SECTION ========== */
.success-section {
    margin-top: 40px;
    animation: fadeInUp 0.6s ease;
}

.success-card {
    background: var(--card-bg);
    border: 2px solid var(--success-color);
    border-radius: 20px;
    padding: 50px 40px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.success-icon {
    margin-bottom: 24px;
}

.success-icon i {
    font-size: 80px;
    color: var(--success-color);
    animation: successPop 0.6s ease;
}

@keyframes successPop {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

.success-card h2 {
    font-size: 32px;
    color: var(--success-color);
    margin-bottom: 12px;
}

.success-card p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.connected-info {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 32px;
    text-align: left;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    margin-bottom: 8px;
}

.info-item i {
    font-size: 20px;
    color: var(--primary-color);
    width: 24px;
}

.info-label {
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.success-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.success-actions .btn {
    min-width: 180px;
}

/* ========== TOAST NOTIFICATIONS ========== */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px 20px;
    min-width: 300px;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-success {
    border-left: 4px solid var(--success-color);
}

.toast-error {
    border-left: 4px solid var(--danger-color);
}

.toast-warning {
    border-left: 4px solid var(--warning-color);
}

.toast-info {
    border-left: 4px solid #17A2B8;
}

.toast i {
    font-size: 20px;
}

.toast-success i {
    color: var(--success-color);
}

.toast-error i {
    color: var(--danger-color);
}

.toast-warning i {
    color: var(--warning-color);
}

.toast-info i {
    color: #17A2B8;
}

.toast-message {
    flex: 1;
    font-size: 14px;
    color: var(--text-primary);
}

/* ========== FOOTER ========== */
.footer {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
    font-size: 14px;
    border-top: 1px solid var(--border-color);
    margin-top: 60px;
}

.footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

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

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .main-container {
        padding: 20px 15px;
    }

    .hero-section h1 {
        font-size: 32px;
    }

    .hero-section p {
        font-size: 16px;
    }

    .session-card,
    .qr-card,
    .success-card {
        padding: 24px;
    }

    .qr-container {
        padding: 24px;
        min-height: 300px;
    }

    .qr-actions,
    .success-actions {
        flex-direction: column;
    }

    .qr-actions .btn,
    .success-actions .btn {
        width: 100%;
    }

    .qr-header {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .toast-container {
        left: 15px;
        right: 15px;
    }

    .toast {
        min-width: auto;
    }
}

/* ========== SCROLLBAR ========== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}