:root {
    --primary-color: #4a90e2;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --background-color: #1a1a2e;
    --card-color: #16213e;
    --text-color: #ffffff;
    --border-radius: 10px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* 3D Background Animation */
.background {
    position: fixed;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.shape {
    position: absolute;
    width: 300px;
    height: 300px;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    border-radius: 50%;
    filter: blur(50px);
    opacity: 0.3;
    animation: float 20s infinite linear;
}

.shape:nth-child(1) {
    top: -150px;
    left: -150px;
    animation-delay: -5s;
}

.shape:nth-child(2) {
    bottom: -150px;
    right: -150px;
    animation-delay: -10s;
}

.shape:nth-child(3) {
    top: 50%;
    left: 50%;
    animation-delay: -15s;
}

@keyframes float {
    0% { transform: rotate(0deg) translate(0, 0); }
    50% { transform: rotate(180deg) translate(100px, 100px); }
    100% { transform: rotate(360deg) translate(0, 0); }
}

/* Navigation */
.navbar {
    background: rgba(22, 33, 62, 0.8);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    margin-left: 2rem;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 4rem 0;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.subtitle {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 3rem;
}

/* Feature Cards */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 4rem 0;
}

.feature-card {
    background: rgba(22, 33, 62, 0.8);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

/* Pricing Section */
.pricing {
    margin: 4rem 0;
}

.price-card {
    background: rgba(22, 33, 62, 0.9);
    max-width: 400px;
    margin: 0 auto;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.price {
    font-size: 3rem;
    color: var(--primary-color);
    margin: 1rem 0;
}

.price span {
    font-size: 1rem;
    color: var(--text-color);
}

.benefits {
    list-style: none;
    margin: 2rem 0;
}

.benefits li {
    margin: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.benefits li::before {
    content: "✓";
    color: var(--primary-color);
    position: absolute;
    left: 0;
}

/* Dashboard */
.dashboard-container {
    padding: 2rem;
}

.dashboard-header {
    margin-bottom: 2rem;
}

.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 500;
    animation: fadeIn 0.3s ease-in;
}

.alert.success {
    background: rgba(46, 213, 115, 0.2);
    color: #2ed573;
    border: 1px solid rgba(46, 213, 115, 0.3);
}

.alert.error {
    background: rgba(255, 71, 87, 0.2);
    color: #ff4757;
    border: 1px solid rgba(255, 71, 87, 0.3);
}

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

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.dashboard-card {
    background: var(--card-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.dashboard-card.full-width {
    grid-column: 1 / -1;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
}

input[type="text"],
input[type="email"],
input[type="password"],
textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
}

/* Buttons */
.cta-button,
.auth-button,
.save-button,
.call-button {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.3s;
}

.cta-button:hover,
.auth-button:hover,
.save-button:hover,
.call-button:hover {
    background: #357abd;
}

/* Switch Toggle */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

/* Voice Selection */
.voice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    max-height: 500px;
    overflow-y: auto;
    padding-right: 1rem;
}

.voice-option {
    background: rgba(255, 255, 255, 0.1);
    padding: 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.3s;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.voice-option.selected {
    background: var(--primary-color);
}

.voice-name {
    font-size: 1.1rem;
    font-weight: bold;
}

.voice-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.voice-labels {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.voice-language, .voice-accent, .voice-gender, .voice-age, .voice-use-case {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
}

.voice-description {
    font-style: italic;
    line-height: 1.4;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
}

.voice-option audio {
    width: 100%;
    margin-top: 0.5rem;
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.05);
}

.voice-option audio::-webkit-media-controls-panel {
    background: rgba(255, 255, 255, 0.1);
}

/* Conversation History */
.conversation-item {
    background: rgba(255, 255, 255, 0.1);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}

.conversation-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.type-badge {
    background: var(--primary-color);
    padding: 0.2rem 0.5rem;
    border-radius: 15px;
    font-size: 0.8rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
}

.modal-content {
    background: var(--card-color);
    margin: 10% auto;
    padding: 2rem;
    border-radius: var(--border-radius);
    max-width: 500px;
    position: relative;
}

.subscription-modal-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.payment-section {
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--border-radius);
}

.payment-section h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
}

#card-element {
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
}

.modal-divider {
    position: relative;
    text-align: center;
    margin: 1rem 0;
}

.modal-divider::before,
.modal-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 45%;
    height: 1px;
    background: rgba(255, 255, 255, 0.2);
}

.modal-divider::before {
    left: 0;
}

.modal-divider::after {
    right: 0;
}

.modal-divider span {
    background: var(--card-color);
    padding: 0 1rem;
    color: rgba(255, 255, 255, 0.5);
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: rgba(255, 255, 255, 0.5);
    transition: color 0.3s;
}

.close:hover {
    color: var(--text-color);
}

/* Subscription Banner */
.subscription-banner {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.subscription-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(255, 255, 255, 0.1), transparent);
    pointer-events: none;
}

.subscription-banner h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.subscription-options {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    margin-top: 1rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
}

.subscription-price {
    text-align: center;
}

.subscription-price .price {
    font-size: 3.5rem;
    font-weight: bold;
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    display: inline-block;
}

.subscription-price .period {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
    margin-left: 0.5rem;
}

.features {
    margin: 2rem 0;
}

.features ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.features li {
    color: white;
    padding-left: 2rem;
    position: relative;
    font-size: 1.1rem;
}

.features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #2ecc71;
    font-weight: bold;
}

.subscription-actions {
    width: 100%;
    max-width: 300px;
}

.subscribe-button {
    width: 100%;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    background: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.subscribe-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.subscribe-button:active {
    transform: translateY(0);
}

.subscription-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    width: 100%;
    max-width: 400px;
}

.promo-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
}

.promo-hint {
    color: var(--text-color);
    font-size: 0.9rem;
    margin: 0;
}

.promo-hint strong {
    color: var(--primary-color);
    font-size: 1.1rem;
}

.promo-input {
    display: flex;
    gap: 0.5rem;
    width: 100%;
}

.promo-input input {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
}

.promo-button {
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.3s;
}

.promo-button:hover {
    background: #357abd;
}

/* Call Options */
.call-options {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

.call-options .switch {
    align-self: flex-start;
}

.call-options .call-button {
    align-self: flex-start;
    margin-top: 1rem;
}

.label-text {
    position: absolute;
    left: 70px;
    top: 50%;
    transform: translateY(-50%);
    white-space: nowrap;
    color: var(--text-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .subscription-options {
        flex-direction: column;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        display: none;
    }
    
    .voice-grid {
        grid-template-columns: 1fr;
    }
}