/* CSS resets and variables */
:root {
    --bg-gradient: radial-gradient(circle at top, #1e1b4b 0%, #0f172a 100%);
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --accent-glow: rgba(99, 102, 241, 0.15);
    --success-color: #10b981;
    --success-glow: rgba(16, 185, 129, 0.2);
    --error-color: #ef4444;
    --error-glow: rgba(239, 68, 68, 0.2);
    --input-bg: rgba(15, 23, 42, 0.6);
    --input-border: #334155;
    --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-stack);
    background: var(--bg-gradient);
    color: var(--text-primary);
    min-height: 100vh;
}

/* Page wrapper component */
.shorty {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 1.5rem;
    overflow-x: hidden;
}

.shorty__container {
    width: 100%;
    max-width: 480px;
    perspective: 1000px;
}

.shorty__footer {
    margin-top: 2rem;
    font-size: 0.75rem;
    color: #4b5563;
    text-align: center;
}

/* Card Component */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--card-border);
    border-radius: 1.5rem;
    padding: 2.5rem 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5),
        inset 0 1px 1px rgba(255, 255, 255, 0.05);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1),
        box-shadow 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 30px 60px -15px rgba(0, 0, 0, 0.6),
        0 0 50px var(--accent-glow),
        inset 0 1px 1px rgba(255, 255, 255, 0.08);
}

.card__header {
    text-align: center;
    margin-bottom: 2rem;
}

.card__logo {
    width: 80px;
    height: 80px;
    margin-bottom: 1rem;
    border-radius: 1.25rem;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35), 0 0 15px rgba(99, 102, 241, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
    object-fit: cover;
}

.card__title {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, #a5b4fc 0%, #c084fc 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.card__subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 400;
}

/* Form Component */
.form__group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form__label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.form__input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.form__input {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: 0.95rem;
    font-family: inherit;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 0.75rem;
    color: var(--text-primary);
    outline: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.form__input::placeholder {
    color: #4b5563;
}

.form__input:focus {
    border-color: #6366f1;
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Input validation states */
.form__input--valid {
    border-color: var(--success-color);
    box-shadow: 0 0 0 3px var(--success-glow);
}

.form__input--invalid:not(:placeholder-shown) {
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px var(--error-glow);
}

/* Open Graph Collapsible Options */
.form__options {
    margin-bottom: 1.5rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 0.75rem;
    background: rgba(15, 23, 42, 0.3);
    overflow: hidden;
    transition: all 0.3s ease;
}

.form__options[open] {
    border-color: rgba(99, 102, 241, 0.25);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.05);
}

.form__options-summary {
    padding: 0.875rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
    transition: color 0.2s ease;
    outline: none;
}

.form__options-summary:hover {
    color: var(--text-primary);
}

.form__options-content {
    padding: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form__options-content .form__group {
    margin-bottom: 0;
}

.form__options-input {
    width: 100%;
    padding: 0.75rem 0.875rem;
    font-size: 0.9rem;
    font-family: inherit;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 0.5rem;
    color: var(--text-primary);
    outline: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.form__options-input::placeholder {
    color: #4b5563;
}

.form__options-input:focus {
    border-color: #6366f1;
    box-shadow: 0 0 0 2px var(--accent-glow);
}

/* Submit Button and Spinner */
.form__submit-btn {
    width: 100%;
    padding: 0.875rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    color: #ffffff;
    background: var(--accent-gradient);
    border: none;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.form__submit-btn:hover:not(:disabled) {
    box-shadow: 0 10px 15px -3px rgba(99, 102, 241, 0.3), 0 4px 6px -2px rgba(99, 102, 241, 0.15);
    filter: brightness(1.1);
}

.form__submit-btn:active:not(:disabled) {
    transform: scale(0.98);
}

.form__submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.form__spinner {
    display: none;
    width: 1.25rem;
    height: 1.25rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #ffffff;
    animation: form-spin 0.8s linear infinite;
}

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

/* Alert Component */
.alert {
    display: none;
    margin-top: 1rem;
    margin-bottom: 1.5rem;
    text-align: center;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    animation: alert-fadeIn 0.3s ease-out;
}

.alert:empty {
    display: none !important;
}

.alert--error {
    display: block;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

.alert--success {
    display: block;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #a7f3d0;
}

@keyframes alert-fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Result Component */
.result {
    display: none;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    animation: result-slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.result--visible {
    display: block;
    margin-top: 1.5rem;
}

.secret-display__textarea {
    font-family: monospace;
    font-size: 0.95rem;
    width: 100%;
    height: 120px;
    resize: none;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 0.75rem;
    color: var(--text-primary);
    padding: 0.75rem;
    margin-right: 0.75rem;
}

.secret-input__textarea {
    height: 100px;
    resize: none;
    padding: 0.75rem;
    font-family: monospace;
}

.secret-display__copy-btn {
    height: 120px;
    align-self: center;
}

.card__actions {
    text-align: center;
    margin-top: 2rem;
}

.card__action-btn {
    text-decoration: none;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: auto;
    padding: 0.75rem 2rem;
}

.u-hidden {
    display: none !important;
}

.result__label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.result__box {
    display: flex;
    align-items: center;
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--input-border);
    border-radius: 0.75rem;
    padding: 0.5rem;
    gap: 0.5rem;
}

.result__url {
    flex-grow: 1;
    padding-left: 0.5rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.9rem;
    color: #38bdf8;
    word-break: break-all;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.result__copy-btn {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
}

.result__copy-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
}

.result__copy-btn:active {
    transform: scale(0.95);
}

.result__copy-btn--copied {
    background: var(--success-color);
    color: #ffffff;
    border-color: var(--success-color);
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.3);
}

@keyframes result-slideUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* QR Code Component */
.qr-code {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--card-border);
    border-radius: 1rem;
    gap: 0.85rem;
    box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.02);
    animation: alert-fadeIn 0.4s ease-out;
}

.qr-code__label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.qr-code__display {
    padding: 0.75rem;
    background: #ffffff;
    border-radius: 0.75rem;
    display: inline-block;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.qr-code__display:hover {
    transform: scale(1.02);
}

.qr-code__display canvas,
.qr-code__display img {
    display: block;
    width: 140px !important;
    height: 140px !important;
}

.qr-code__download-btn {
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
    font-weight: 600;
    font-family: inherit;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    white-space: nowrap;
}

.qr-code__download-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
}

.qr-code__download-btn:active {
    transform: scale(0.95);
}