/* Bio Generator - Mobile-first styles */

:root {
    /* Brand gradient */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --color-primary: #667eea;
    --color-secondary: #764ba2;

    /* Platform colors */
    --instagram: #E4405F;
    --twitter: #1DA1F2;
    --linkedin: #0A66C2;
    --tinder: #FE3C72;

    /* UI colors */
    --bg-dark: #0f0f23;
    --bg-card: #1a1a2e;
    --bg-input: #252542;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b80;
    --border-color: #3a3a5a;

    /* Status colors */
    --success: #10B981;
    --error: #EF4444;
    --warning: #F59E0B;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;

    /* Transitions */
    --transition-speed: 0.2s;
}

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

html {
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100dvh;
    line-height: 1.5;
}

.container {
    max-width: 480px;
    margin: 0 auto;
    padding: var(--spacing-md);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    text-align: center;
    padding: var(--spacing-lg) 0;
}

.header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.usage-counter {
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.usage-counter.warning {
    color: var(--warning);
}

.usage-counter.empty {
    color: var(--error);
}

/* Form */
.bio-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

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

.select-wrapper {
    position: relative;
}

.select-wrapper::after {
    content: '';
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid var(--text-secondary);
    pointer-events: none;
}

select,
input,
textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
    -webkit-appearance: none;
    appearance: none;
}

select {
    cursor: pointer;
    padding-right: 40px;
}

input::placeholder,
textarea::placeholder {
    color: var(--text-muted);
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

input.error,
textarea.error {
    border-color: var(--error);
}

.error-message {
    font-size: 0.75rem;
    color: var(--error);
    min-height: 1rem;
}

textarea {
    resize: vertical;
    min-height: 60px;
}

/* Generate Button */
.btn-generate {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    min-height: 56px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed), opacity var(--transition-speed);
    position: relative;
    overflow: hidden;
}

.btn-generate:active {
    transform: scale(0.98);
}

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

.btn-text,
.btn-loading {
    display: inline-block;
}

.btn-loading {
    display: none;
}

.btn-generate.loading .btn-text {
    display: none;
}

.btn-generate.loading .btn-loading {
    display: inline-block;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Results Section */
.results-section {
    display: none;
    margin-top: var(--spacing-xl);
}

.results-section.visible {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

.results-section h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.results-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Bio Card */
.bio-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    animation: slideUp 0.3s ease-out;
    animation-fill-mode: both;
}

.bio-card:nth-child(1) { animation-delay: 0s; }
.bio-card:nth-child(2) { animation-delay: 0.05s; }
.bio-card:nth-child(3) { animation-delay: 0.1s; }
.bio-card:nth-child(4) { animation-delay: 0.15s; }
.bio-card:nth-child(5) { animation-delay: 0.2s; }

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

.bio-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.bio-number {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.bio-char-count {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.bio-text {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    white-space: pre-wrap;
    word-break: break-word;
}

.btn-copy {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    min-height: 44px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    transition: background var(--transition-speed), border-color var(--transition-speed);
}

.btn-copy:active {
    background: var(--border-color);
}

.btn-copy.copied {
    background: var(--success);
    border-color: var(--success);
}

/* Error Section */
.error-section {
    display: none;
    margin-top: var(--spacing-xl);
}

.error-section.visible {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

.error-content {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--error);
}

.error-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-md);
}

.error-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.btn-retry {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    background: var(--error);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    min-height: 48px;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.btn-retry:active {
    opacity: 0.8;
}

/* Limit Section */
.limit-section {
    display: none;
    margin-top: var(--spacing-xl);
}

.limit-section.visible {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

.limit-content {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--warning);
}

.limit-icon {
    font-size: 2.5rem;
    display: block;
    margin-bottom: var(--spacing-md);
}

.limit-content h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--warning);
}

.limit-content p {
    color: var(--text-secondary);
}

.limit-countdown {
    margin-top: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Skeleton loading */
.skeleton-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.skeleton-line {
    height: 16px;
    background: linear-gradient(90deg, var(--bg-input) 25%, var(--border-color) 50%, var(--bg-input) 75%);
    background-size: 200% 100%;
    border-radius: 4px;
    animation: shimmer 1.5s infinite;
}

.skeleton-line:not(:last-child) {
    margin-bottom: var(--spacing-xs);
}

.skeleton-line.short {
    width: 60%;
}

.skeleton-line.medium {
    width: 80%;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--success);
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: transform 0.3s ease-out, opacity 0.3s ease-out;
    z-index: 1000;
}

.toast.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Footer */
.footer {
    margin-top: auto;
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.footer a {
    color: var(--color-primary);
    text-decoration: none;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Platform indicator on select */
select option[value="instagram"] { color: var(--instagram); }
select option[value="twitter"] { color: var(--twitter); }
select option[value="linkedin"] { color: var(--linkedin); }
select option[value="tinder"] { color: var(--tinder); }

/* Responsive - Tablet and up */
@media (min-width: 768px) {
    .container {
        padding: var(--spacing-xl);
    }

    .header h1 {
        font-size: 2rem;
    }

    .btn-generate:hover:not(:disabled) {
        box-shadow: 0 4px 20px rgba(102, 126, 234, 0.4);
    }

    .btn-copy:hover {
        border-color: var(--color-primary);
    }
}