/* CSS Variables for Telegram Theme Integration */
:root {
    --tg-theme-bg-color: #ffffff;
    --tg-theme-text-color: #000000;
    --tg-theme-hint-color: #999999;
    --tg-theme-link-color: #2481cc;
    --tg-theme-button-color: #2481cc;
    --tg-theme-button-text-color: #ffffff;
    --tg-theme-secondary-bg-color: #f0f0f0;

    /* Custom colors */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --success-color: #34c759;
    --error-color: #ff3b30;
    --warning-color: #ff9500;
    --card-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --border-radius: 16px;
    --border-radius-sm: 12px;
}

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

html,
body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    max-width: 480px;
    margin: 0 auto;
    padding: 16px;
    padding-bottom: env(safe-area-inset-bottom, 16px);
}

/* Header */
.header {
    text-align: center;
    padding: 24px 0;
}

.header-icon {
    font-size: 48px;
    margin-bottom: 12px;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-8px);
    }
}

.header h1 {
    font-size: 28px;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
}

.subtitle {
    color: var(--tg-theme-hint-color);
    font-size: 14px;
}

/* Main Content */
.main-content {
    flex: 1;
}

/* Form */
.form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-section {
    background: var(--tg-theme-secondary-bg-color);
    border-radius: var(--border-radius);
    padding: 16px;
}

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

.label-icon {
    font-size: 18px;
}

/* File Upload */
.file-upload {
    position: relative;
    background: var(--tg-theme-bg-color);
    border: 2px dashed var(--tg-theme-hint-color);
    border-radius: var(--border-radius-sm);
    padding: 32px 16px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.file-upload:hover,
.file-upload.dragover {
    border-color: var(--tg-theme-button-color);
    background: rgba(36, 129, 204, 0.05);
}

.file-upload.has-file {
    border-color: var(--success-color);
    border-style: solid;
    background: rgba(52, 199, 89, 0.05);
}

.file-upload input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.upload-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.upload-text {
    font-weight: 500;
    font-size: 15px;
    color: var(--tg-theme-text-color);
    margin-bottom: 4px;
}

.upload-hint {
    font-size: 12px;
    color: var(--tg-theme-hint-color);
}

/* Time Inputs */
.time-inputs {
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--tg-theme-bg-color);
    border-radius: var(--border-radius-sm);
    padding: 16px;
}

.time-input-group {
    flex: 1;
    text-align: center;
}

.time-input-group label {
    display: block;
    font-size: 12px;
    color: var(--tg-theme-hint-color);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.time-input-group input {
    width: 100%;
    padding: 12px;
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    border: 2px solid var(--tg-theme-secondary-bg-color);
    border-radius: 8px;
    background: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    transition: border-color 0.2s ease;
}

.time-input-group input:focus {
    outline: none;
    border-color: var(--tg-theme-button-color);
}

.time-input-group input::placeholder {
    color: var(--tg-theme-hint-color);
}

.time-separator {
    font-size: 24px;
    color: var(--tg-theme-hint-color);
    padding-top: 20px;
}

.time-hint {
    font-size: 12px;
    color: var(--tg-theme-hint-color);
    text-align: center;
    margin-top: 12px;
}

/* Format Select */
.format-select-wrapper {
    background: var(--tg-theme-bg-color);
    border-radius: var(--border-radius-sm);
    padding: 4px;
}

.format-select {
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--tg-theme-text-color);
    background: var(--tg-theme-bg-color);
    border: 2px solid var(--tg-theme-secondary-bg-color);
    border-radius: 8px;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
    transition: border-color 0.2s ease;
}

.format-select:focus {
    outline: none;
    border-color: var(--tg-theme-button-color);
}

.format-select option {
    padding: 12px;
    background: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
}

/* Submit Button */
.submit-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 16px 24px;
    font-size: 17px;
    font-weight: 600;
    color: var(--tg-theme-button-text-color);
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.submit-btn:active {
    transform: translateY(0);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.submit-btn.loading .btn-icon {
    animation: spin 1s linear infinite;
}

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

    to {
        transform: rotate(360deg);
    }
}

.btn-icon {
    font-size: 20px;
}

/* Status Area */
.status-area {
    margin-top: 24px;
    padding: 20px;
    border-radius: var(--border-radius);
    text-align: center;
    animation: fadeIn 0.3s ease;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.status-area.hidden {
    display: none;
}

.status-area.loading {
    background: rgba(36, 129, 204, 0.1);
}

.status-area.success {
    background: rgba(52, 199, 89, 0.1);
}

.status-area.error {
    background: rgba(255, 59, 48, 0.1);
}

.status-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.status-icon {
    font-size: 40px;
}

.status-area.loading .status-icon {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

.status-message {
    font-size: 15px;
    font-weight: 500;
    color: var(--tg-theme-text-color);
}

.status-area.error .status-message {
    color: var(--error-color);
}

.status-area.success .status-message {
    color: var(--success-color);
}

/* Footer */
.footer {
    padding: 24px 0;
    text-align: center;
}

.footer p {
    font-size: 12px;
    color: var(--tg-theme-hint-color);
}

/* Responsive adjustments */
@media (max-width: 360px) {
    .container {
        padding: 12px;
    }

    .header h1 {
        font-size: 24px;
    }

    .time-input-group input {
        font-size: 16px;
        padding: 10px;
    }
}

/* Dark mode adjustments (Telegram handles this via CSS variables) */
@media (prefers-color-scheme: dark) {
    :root {
        --tg-theme-bg-color: #1c1c1e;
        --tg-theme-text-color: #ffffff;
        --tg-theme-hint-color: #8e8e93;
        --tg-theme-secondary-bg-color: #2c2c2e;
    }
}