/**
 * Perplexity Pro Activation - Main Stylesheet
 * Dark theme matching perplexityredeem.online
 */

/* ========== CSS Variables ========== */
:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #25274D;
    --accent-color: #20808D;
    --accent-hover: #1a6b77;
    --text-primary: #ffffff;
    --text-secondary: #b8b8c7;
    --error-color: #ff4757;
    --success-color: #26de81;
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== Reset & Base ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

/* ========== Container ========== */
.container {
    max-width: 500px;
    width: 100%;
    animation: fadeIn 0.5s ease-in;
}

/* ========== Header ========== */
header {
    text-align: center;
    margin-bottom: 30px;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--accent-color), #4da8b7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.warning {
    font-size: 0.9rem;
    color: var(--error-color);
    font-style: italic;
}

/* ========== Card ========== */
.card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    margin-bottom: 20px;
    transition: var(--transition);
}

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    text-align: center;
}

.step-desc {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 25px;
    font-size: 0.95rem;
}

/* ========== Forms & Inputs ========== */
.input-group {
    margin-bottom: 20px;
}

input[type="email"],
input[type="text"]:not(.otp-input) {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-primary);
    border: 2px solid transparent;
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
}

input[type="email"]:focus,
input[type="text"]:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(32, 128, 141, 0.1);
}

/* ========== OTP Input ========== */
.otp-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 25px;
}

.otp-input {
    width: 50px;
    height: 60px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 600;
    background: var(--bg-primary);
    border: 2px solid transparent;
    border-radius: 8px;
    color: var(--text-primary);
    transition: var(--transition);
    outline: none;
}

.otp-input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(32, 128, 141, 0.1);
    transform: scale(1.05);
}

.otp-input.filled {
    border-color: var(--accent-color);
}

/* ========== Buttons ========== */
.btn {
    width: 100%;
    padding: 14px 24px;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    text-decoration: none;
    text-align: center;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(32, 128, 141, 0.3);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn.loading .btn-text {
    opacity: 0.5;
}

/* ========== Spinner ========== */
.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ========== Messages ========== */
.message {
    margin-top: 15px;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    display: none;
    animation: slideDown 0.3s ease;
}

.message.show {
    display: block;
}

.message.error {
    background: rgba(255, 71, 87, 0.1);
    border: 1px solid var(--error-color);
    color: var(--error-color);
}

.message.success {
    background: rgba(38, 222, 129, 0.1);
    border: 1px solid var(--success-color);
    color: var(--success-color);
}

.message.info {
    background: rgba(32, 128, 141, 0.1);
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
}

/* ========== Success Animation ========== */
.success-animation {
    display: flex;
    justify-content: center;
    margin-bottom: 25px;
}

.checkmark {
    width: 100px;
    height: 100px;
    stroke-width: 2;
    stroke: var(--success-color);
    stroke-miterlimit: 10;
    animation: checkmark-fill 0.4s ease-in-out 0.4s forwards;
}

.checkmark-circle {
    stroke-dasharray: 166;
    stroke-dashoffset: 166;
    animation: checkmark-stroke 0.6s cubic-bezier(0.65, 0, 0.45, 1) forwards;
}

.checkmark-check {
    stroke-dasharray: 48;
    stroke-dashoffset: 48;
    animation: checkmark-stroke 0.3s cubic-bezier(0.65, 0, 0.45, 1) 0.8s forwards;
}

@keyframes checkmark-stroke {
    to {
        stroke-dashoffset: 0;
    }
}

@keyframes checkmark-fill {
    to {
        opacity: 1;
    }
}

/* ========== Language Modal ========== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 40px;
    max-width: 400px;
    width: 90%;
    animation: scaleIn 0.3s ease;
}

.modal-content h2 {
    text-align: center;
    margin-bottom: 30px;
}

.language-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.language-btn {
    padding: 20px;
    background: var(--bg-primary);
    border: 2px solid transparent;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--text-primary);
}

.language-btn:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.language-btn .flag {
    font-size: 2.5rem;
}

.language-btn .lang-name {
    font-size: 1rem;
    font-weight: 600;
}

/* ========== Footer ========== */
footer {
    text-align: center;
    margin-top: 20px;
}

.language-switcher .lang-btn {
    background: transparent;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    padding: 8px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.language-switcher .lang-btn:hover {
    background: var(--accent-color);
    color: var(--text-primary);
}

/* ========== Visibility Classes ========== */
.hidden {
    display: none !important;
}

.error-card {
    text-align: center;
    border: 2px solid var(--error-color);
}

/* ========== Animations ========== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

/* ========== Responsive Design ========== */
@media (max-width: 480px) {
    header h1 {
        font-size: 1.5rem;
    }

    .card {
        padding: 20px;
    }

    .otp-input {
        width: 40px;
        height: 50px;
        font-size: 1.2rem;
    }

    .language-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        padding: 30px 20px;
    }
}

@media (max-width: 360px) {
    .otp-container {
        gap: 6px;
    }

    .otp-input {
        width: 35px;
        height: 45px;
        font-size: 1.1rem;
    }
}