/* --- Shortener Page & Component Variables --- */
.shortener-page-container {
    /* Scoped CSS variables for the shortener component */
    /* These can be easily tweaked without affecting the rest of the site. */
    --shortener-card-bg: rgba(22, 22, 22, 0.5); /* Dark, semi-transparent bg */
    --shortener-border: rgba(255, 255, 255, 0.15);
    --shortener-input-bg: rgba(0, 0, 0, 0.3);
    --shortener-text-primary: var(--clr-text, #FFFFFF);
    --shortener-text-secondary: var(--clr-text-secondary, #ccc);
    --shortener-text-placeholder: #6b7280;
    --shortener-accent: var(--clr-accent, #00FFFF);
    --shortener-accent-hover: var(--clr-text, #FFFFFF); /* Use white for hover to match site's CTA */
    --shortener-accent-text: var(--clr-dark, #000000);
    --shortener-success: #4ade80; /* green-400 */
    --shortener-success-button: #16a34a; /* green-600 */
    --shortener-success-button-hover: #15803d; /* green-700 */
    --shortener-error: #f87171; /* red-400 */
    --shortener-error-bg: rgba(76, 29, 29, 0.5); /* red-900 with 50% opacity */
    --shortener-error-border: #b91c1c; /* red-700 */
    --shortener-notice-bg: rgba(55, 65, 81, 0.2);
    --shortener-notice-border: rgba(255, 255, 255, 0.1);
    --shortener-notice-text: #d1d5db;

    /* Layout styles for the page */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem 5%;
    font-family: var(--font-primary, 'Inter', sans-serif);
}

/* --- Main Container & Card --- */
.shortener-container {
    width: 100%;
    max-width: 48rem; /* 768px */
}

.shortener-card {
    background-color: var(--shortener-card-bg);
    backdrop-filter: blur(4px);
    border: 1px solid var(--shortener-border);
    border-radius: 1rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    padding: 2.5rem;
}

/* --- Header --- */
.shortener-header {
    text-align: center;
    margin-bottom: 2rem;
}

.shortener-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--shortener-text-primary);
    letter-spacing: -0.025em;
}

.shortener-header p {
    color: var(--shortener-text-secondary);
    margin-top: 0.5rem;
}

/* --- Form Elements --- */
.shorten-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-main-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.form-input, .form-input-advanced {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--shortener-input-bg);
    border: 1px solid var(--shortener-border);
    border-radius: 0.5rem;
    color: var(--shortener-text-primary);
    transition: border-color 0.3s, box-shadow 0.3s;
    font-family: inherit;
    font-size: 1rem;
}
.form-input-advanced {
     padding: 0.5rem 1rem;
}

.form-input::placeholder, .form-input-advanced::placeholder {
    color: var(--shortener-text-placeholder);
}

.form-input:focus, .form-input-advanced:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--shortener-accent);
    border-color: var(--shortener-accent);
}

.submit-button {
    width: 100%;
    padding: 0.75rem 1.5rem;
    background-color: var(--shortener-accent);
    color: var(--shortener-accent-text);
    font-weight: 600;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.submit-button:hover {
    background-color: var(--shortener-accent-hover);
}

.submit-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* --- Advanced Options --- */
.advanced-options-toggle {
    text-align: center;
}

#toggle-options {
    background: none;
    border: none;
    color: var(--shortener-text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    transition: color 0.3s;
    font-family: inherit;
}
#toggle-options:hover {
    color: var(--shortener-text-primary);
}

#chevron-icon {
    display: inline-block;
    transition: transform 0.3s ease-in-out;
    vertical-align: middle; /* Aligns icon better with text */
}
#chevron-icon.rotate-180 {
    transform: rotate(180deg);
}

.advanced-options {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease-in-out, opacity 0.5s ease-in-out, padding-top 0.5s ease-in-out;
    opacity: 0;
    border-top: 1px solid var(--shortener-border);
}
.advanced-options.open {
    max-height: 500px;
    opacity: 1;
    padding-top: 1.5rem;
}

.advanced-options-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}

.private-checkbox-container {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    background-color: rgba(55, 65, 81, 0.3);
    padding: 0.5rem;
    border-radius: 0.5rem;
}

#private {
    height: 1rem;
    width: 1rem;
    border-radius: 0.25rem;
    cursor: pointer;
    accent-color: var(--shortener-accent);
}

#private + label {
    font-size: 0.875rem;
    color: var(--shortener-text-primary);
    cursor: pointer;
}

/* --- Result, Error & Notice Display --- */
.security-notice {
    margin-top: 2rem;
    padding: 1rem;
    background-color: var(--shortener-notice-bg);
    border: 1px solid var(--shortener-notice-border);
    border-radius: 0.5rem;
    text-align: left;
}

.security-notice p {
    font-size: 0.875rem;
    line-height: 1.4;
    color: var(--shortener-notice-text);
}

.security-notice strong {
    color: var(--shortener-text-primary);
    font-weight: 600;
}

.result-area {
    margin-top: 2rem;
    background-color: var(--shortener-input-bg);
    border: 1px solid var(--shortener-accent);
    border-radius: 0.5rem;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

#result-text {
    color: var(--shortener-success);
    font-weight: 500;
    font-size: 1.125rem;
    word-break: break-all;
    text-align: center;
}

.copy-button {
    width: 100%;
    padding: 0.5rem 1.25rem;
    background-color: var(--shortener-success-button);
    color: var(--shortener-text-primary);
    font-weight: 600;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: background-color 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}
.copy-button:hover {
    background-color: var(--shortener-success-button-hover);
}

.error-area {
    margin-top: 1.5rem;
    background-color: var(--shortener-error-bg);
    border: 1px solid var(--shortener-error-border);
    border-radius: 0.5rem;
    padding: 1rem;
    text-align: center;
}

#error-text {
    color: var(--shortener-error);
    font-weight: 500;
}

/* --- Section Controls --- */
.back-button {
    background: none;
    border: 1px solid var(--shortener-border);
    color: var(--shortener-text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    align-self: flex-start; /* Aligns to the left of the container */
    margin-bottom: 1rem; /* Space between button and card */
}

.back-button:hover {
    background-color: var(--shortener-accent);
    color: var(--shortener-accent-text);
    border-color: var(--shortener-accent);
}

/* --- Utility & Animation Classes --- */
.hidden {
    display: none !important;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}
.spinner {
    width: 1.25rem; /* 20px */
    height: 1.25rem;
    border: 4px solid rgba(0, 0, 0, 0.3);
    border-top-color: var(--shortener-accent-text);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

input[type="date"]::-webkit-calendar-picker-indicator {
    filter: invert(0.8);
    cursor: pointer;
}

/* --- Responsive Design (Media Queries) --- */
@media (min-width: 640px) { /* sm breakpoint */
    .form-main-group {
        flex-direction: row;
    }
    .submit-button {
        width: auto;
    }
    .result-area {
        flex-direction: row;
    }
    .copy-button {
        width: auto;
    }
    .advanced-options-grid {
         grid-template-columns: repeat(2, 1fr);
    }
}