/**
 * Common Components
 * Reusable UI components used across multiple pages
 */

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-primary:disabled {
    background: var(--border-color);
    cursor: not-allowed;
    transform: none;
}

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

.btn-secondary:hover {
    background: var(--bg-hover);
}

.btn-warning {
    background: var(--color-warning);
    color: white;
}

.btn-warning:hover {
    background: var(--color-warning-hover);
}

.btn-danger {
    background: var(--color-error);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(239, 68, 68, 0.3);
}

.btn-submit {
    width: 100%;
    padding: 14px;
    background: var(--accent-secondary);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 10px;
}

.btn-submit:hover {
    background: var(--accent-secondary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(15, 157, 88, 0.4);
}

.btn-submit:disabled {
    background: #555;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-link {
    display: inline-block;
    padding: 12px 30px;
    background: var(--accent-secondary);
    color: white;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
}

.btn-link:hover {
    background: var(--accent-secondary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(15, 157, 88, 0.4);
    text-decoration: none;
}

.button-row {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

/* ============================================
   FORMS
   ============================================ */

label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-label);
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-secondary);
}

.form-group input::placeholder {
    color: #666;
}

select,
input[type="number"],
input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: 0.75rem;
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s;
}

select:hover,
input[type="number"]:hover {
    border-color: var(--accent);
}

select:focus,
input[type="number"]:focus,
input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: var(--accent);
}

select {
    cursor: pointer;
}

.input-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.input-group.small {
    flex: 0 0 120px;
}

.helper-text {
    font-size: 0.8rem;
    color: #666;
    margin-top: 4px;
}

.optional {
    font-weight: 400;
    color: #666;
    font-size: 0.8rem;
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-card);
}

.card h2 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

/* ============================================
   MESSAGES
   ============================================ */

.message {
    padding: 12px 15px;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    display: none;
    white-space: pre-wrap;
    word-break: break-word;
}

.message.visible {
    display: block;
}

.message.success {
    background: var(--color-success-bg);
    border: 1px solid var(--color-success);
    color: var(--color-success);
}

.message.error {
    background: var(--color-error-bg);
    border: 1px solid var(--color-error-border);
    color: var(--color-error-border);
}

.error-message {
    background: var(--color-error-dark-bg);
    border: 1px solid var(--color-error);
    color: var(--color-error-dark-text);
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 1rem;
}

.success-message {
    background: var(--color-success-dark-bg);
    border: 1px solid var(--accent);
    color: var(--color-success-dark-text);
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    margin-bottom: 1rem;
}

/* ============================================
   LOADING / SPINNER
   ============================================ */

.loading {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
}

.loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 0.5rem;
    vertical-align: middle;
}

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

/* ============================================
   TABS
   ============================================ */

.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.tab-btn {
    padding: 0.5rem 1rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    border-radius: var(--border-radius-xs) var(--border-radius-xs) 0 0;
    transition: all 0.2s;
}

.tab-btn:hover {
    color: var(--text-primary);
}

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

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ============================================
   CONTAINER
   ============================================ */

.container {
    max-width: 1000px;
    margin: 0 auto;
}

/* ============================================
   HEADER ROW (title + sponsor)
   ============================================ */

header {
    flex: 1;
}

.header-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.header-row header,
.header-row .sponsor-box {
    padding-top: 0;
    margin-top: 0;
}

.header-row h1 {
    margin-top: 0;
    line-height: 1;
}

h1 {
    font-size: 1.75rem;
    color: var(--accent);
    margin-bottom: 0.25rem;
    font-weight: 700;
}

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

/* ============================================
   CHART CONTAINER
   ============================================ */

.chart-container {
    position: relative;
    height: 400px;
    margin: 1rem 0;
    padding: 1rem;
    background: var(--bg-primary);
    border-radius: var(--border-radius-sm);
}

/* ============================================
   SHARE BUTTONS
   ============================================ */

.share-buttons {
    display: flex;
    gap: 0.5rem;
}

.share-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--border-color);
    border: none;
    border-radius: var(--border-radius-xs);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.share-btn:hover {
    background: var(--bg-hover);
    transform: translateY(-2px);
}

/* ============================================
   DISCLAIMER
   ============================================ */

.disclaimer {
    margin-top: 2rem;
    padding: 1rem;
    background: var(--bg-card);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.75rem;
    text-align: center;
}

/* ============================================
   SPONSOR BOX
   ============================================ */

.sponsor-box {
    flex-shrink: 0;
    text-align: right;
}

.sponsor-box a {
    display: block;
}

.sponsor-box img {
    display: block;
    max-width: 234px;
    height: auto;
    border-radius: 4px;
    opacity: 0.9;
    transition: opacity 0.2s;
}

.sponsor-box img:hover {
    opacity: 1;
}

.sponsor-text {
    display: block;
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* ============================================
   TOOL LINKS (expandable circle buttons)
   ============================================ */

.tool-links {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-shrink: 0;
}

.tool-circle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 18px;
    background: var(--bg-hover);
    border: 2px solid var(--border-color);
    color: var(--accent);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 700;
    transition: all 0.3s ease;
    overflow: hidden;
    white-space: nowrap;
}

.circle-letter {
    display: inline;
}

.circle-text {
    display: inline;
    max-width: 0;
    opacity: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.tool-circle:hover {
    width: auto;
    padding: 0 12px;
    background: var(--border-color);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.tool-circle:hover .circle-text {
    max-width: 100px;
    opacity: 1;
}

/* ============================================
   INPUT SPINNER REMOVAL
   ============================================ */

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}

/* ============================================
   RESULTS HEADER
   ============================================ */

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.results-header h2 {
    margin: 0;
    padding: 0;
    border: none;
}

/* ============================================
   ICON (verify/reset pages)
   ============================================ */

.icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.icon.success { color: var(--color-success); }
.icon.error { color: var(--color-error-border); }

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .header-row {
        flex-direction: column;
        text-align: center;
    }

    .sponsor-box {
        text-align: center;
        width: 100%;
    }

    .sponsor-box img {
        max-width: 100%;
    }

    .input-row {
        flex-direction: column;
    }

    .input-group.small {
        flex: 1;
    }

    .chart-container {
        height: 300px;
    }

    h1 {
        font-size: 1.5rem;
    }

    .button-row {
        flex-direction: column;
    }

    .button-row .btn {
        width: 100%;
    }

    .tabs {
        flex-wrap: wrap;
    }
}

/* ============================================
   PRINT
   ============================================ */

@media print {
    body {
        background: white;
        color: black;
    }

    .nav-bar,
    .share-buttons,
    .btn,
    .button-row,
    .sponsor-box,
    .login-prompt,
    .tabs {
        display: none;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}