/* ============================================================
   tools.css — KnittingNetwork Super-Tools Shared Styles
   ============================================================ */

/* ----- Design Tokens ----- */
:root {
    --tool-primary: #7c3aed;
    --tool-primary-light: #a78bfa;
    --tool-primary-dark: #5b21b6;
    --tool-accent: #f59e0b;
    --tool-success: #10b981;
    --tool-danger: #ef4444;
    --tool-bg: #faf9ff;
    --tool-card-bg: #ffffff;
    --tool-border: #e8e0f5;
    --tool-text: #1e1b2e;
    --tool-muted: #6b7280;
    --tool-radius: 16px;
    --tool-shadow: 0 4px 24px rgba(124, 58, 237, 0.08);
    --tool-shadow-hover: 0 8px 40px rgba(124, 58, 237, 0.15);
}

/* ----- Tool Page Layout ----- */
.tools-hero {
    background: linear-gradient(135deg, #7c3aed 0%, #4f46e5 50%, #06b6d4 100%);
    border-radius: 0 0 32px 32px;
    padding: 3rem 1.5rem 4rem;
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.tools-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 400px;
    height: 400px;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
}

.tools-hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: rgba(255,255,255,0.04);
    border-radius: 50%;
}

.tools-hero h1 {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 0.5rem;
}

.tools-hero p {
    font-size: 1.1rem;
    opacity: 0.9;
    max-width: 560px;
    margin: 0 auto;
}

/* ----- Tool Card on Index ----- */
.tool-card {
    background: var(--tool-card-bg);
    border: 1.5px solid var(--tool-border);
    border-radius: var(--tool-radius);
    box-shadow: var(--tool-shadow);
    transition: all 0.3s ease;
    text-decoration: none;
    color: var(--tool-text);
    display: block;
    padding: 1.75rem;
    height: 100%;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--tool-shadow-hover);
    border-color: var(--tool-primary-light);
    color: var(--tool-text);
    text-decoration: none;
}

.tool-card-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.tool-card-badge {
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    padding: 2px 8px;
    border-radius: 20px;
    text-transform: uppercase;
}

/* ----- Tool Page Wrapper ----- */
.tool-page {
    background: var(--tool-bg);
    min-height: 80vh;
    padding-bottom: 4rem;
}

.tool-page-header {
    background: white;
    border-bottom: 1px solid var(--tool-border);
    padding: 1.25rem 0;
    margin-bottom: 2rem;
}

.tool-page-header .tool-icon-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    background: linear-gradient(135deg, var(--tool-primary), #4f46e5);
    color: white;
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
}

/* ----- Step / Section Card ----- */
.tool-section {
    background: white;
    border: 1.5px solid var(--tool-border);
    border-radius: var(--tool-radius);
    box-shadow: var(--tool-shadow);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.tool-section-header {
    background: linear-gradient(135deg, #f5f3ff, #ede9fe);
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--tool-border);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
}

.tool-section-header .step-badge {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--tool-primary);
    color: white;
    font-weight: 800;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.tool-section-header h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--tool-primary-dark);
    margin: 0;
}

.tool-section-body {
    padding: 1.5rem;
}

/* ----- Inputs ----- */
.tool-input-group {
    margin-bottom: 1.25rem;
}

.tool-input-group label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--tool-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.375rem;
    display: block;
}

.tool-input {
    border: 1.5px solid var(--tool-border);
    border-radius: 10px;
    padding: 0.65rem 1rem;
    font-size: 0.95rem;
    width: 100%;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: white;
    color: var(--tool-text);
}

.tool-input:focus {
    outline: none;
    border-color: var(--tool-primary);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.12);
}

/* ----- Result Box ----- */
.tool-result {
    background: linear-gradient(135deg, #f5f3ff, #ede9fe);
    border: 1.5px solid #c4b5fd;
    border-radius: 12px;
    padding: 1.25rem 1.5rem;
    margin-top: 1.25rem;
}

.tool-result-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--tool-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.25rem;
}

.tool-result-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--tool-primary-dark);
    line-height: 1.2;
}

.tool-result-sub {
    font-size: 0.85rem;
    color: var(--tool-muted);
    margin-top: 0.25rem;
}

.tool-result-formula {
    font-family: 'Courier New', monospace;
    background: white;
    border: 1px dashed #c4b5fd;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    color: var(--tool-primary-dark);
    margin-top: 0.75rem;
    letter-spacing: 0.3px;
}

/* ----- Warning / Alert boxes ----- */
.tool-warning {
    background: #fffbeb;
    border: 1.5px solid #fcd34d;
    border-radius: 10px;
    padding: 0.875rem 1rem;
    font-size: 0.875rem;
    color: #92400e;
    display: flex;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.tool-success-box {
    background: #ecfdf5;
    border: 1.5px solid #6ee7b7;
    border-radius: 10px;
    padding: 0.875rem 1rem;
    font-size: 0.875rem;
    color: #065f46;
}

/* ----- CTA / Upgrade Banner ----- */
.upgrade-banner {
    background: linear-gradient(135deg, #7c3aed, #4f46e5);
    border-radius: var(--tool-radius);
    padding: 2rem;
    text-align: center;
    color: white;
    margin-top: 2rem;
}

.upgrade-banner h4 {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.upgrade-banner p {
    opacity: 0.9;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.btn-upgrade {
    background: white;
    color: var(--tool-primary);
    font-weight: 700;
    border-radius: 50px;
    padding: 0.6rem 2rem;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-upgrade:hover {
    transform: scale(1.04);
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

/* ----- Freemium Overlay Modal ----- */
.freemium-overlay {
    position: fixed;
    inset: 0;
    background: rgba(30, 27, 46, 0.7);
    backdrop-filter: blur(4px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.freemium-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.freemium-modal {
    background: white;
    border-radius: 24px;
    padding: 2.5rem;
    max-width: 460px;
    width: 100%;
    text-align: center;
    transform: translateY(20px);
    transition: transform 0.3s;
    position: relative;
}

.freemium-overlay.active .freemium-modal {
    transform: translateY(0);
}

.freemium-modal-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: linear-gradient(135deg, #7c3aed, #4f46e5);
    color: white;
    font-size: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
}

.freemium-modal h3 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--tool-text);
    margin-bottom: 0.5rem;
}

.freemium-modal p {
    color: var(--tool-muted);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.freemium-modal .perks {
    list-style: none;
    padding: 0;
    margin: 0 0 1.5rem;
    text-align: left;
}

.freemium-modal .perks li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--tool-text);
    padding: 0.375rem 0;
}

.freemium-modal .perks li i {
    color: var(--tool-success);
    font-size: 0.875rem;
}

.btn-join {
    background: linear-gradient(135deg, #7c3aed, #4f46e5);
    color: white;
    font-weight: 700;
    border-radius: 50px;
    padding: 0.75rem 2.25rem;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    width: 100%;
    display: block;
    margin-bottom: 0.75rem;
    transition: all 0.2s;
    text-decoration: none;
}

.btn-join:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(124,58,237,0.35);
    color: white;
    text-decoration: none;
}

.btn-login-link {
    font-size: 0.875rem;
    color: var(--tool-muted);
    background: none;
    border: none;
    cursor: pointer;
}

.btn-login-link a {
    color: var(--tool-primary);
    font-weight: 600;
    text-decoration: none;
}

/* ----- Responsive ----- */
@media (max-width: 768px) {
    .tool-section-body {
        padding: 1rem;
    }
    .tool-result-value {
        font-size: 1.4rem;
    }
}