/* =========================================
   Design System – Component Library
   All colors reference :root variables only.
   ========================================= */

/* ── Typography ── */

.ds-heading-1 {
    font-size: 42px;
    line-height: 1.2;
    font-weight: 700;
    color: var(--text-color);
    margin: 0 0 16px 0;
}

.ds-heading-2 {
    font-size: 32px;
    line-height: 1.25;
    font-weight: 600;
    color: var(--text-color);
    margin: 0 0 14px 0;
}

.ds-heading-3 {
    font-size: 24px;
    line-height: 1.3;
    font-weight: 600;
    color: var(--text-color);
    margin: 0 0 12px 0;
}

.ds-heading-4 {
    font-size: 18px;
    line-height: 1.4;
    font-weight: 600;
    color: var(--text-color);
    margin: 0 0 10px 0;
}

.ds-body {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-color);
}

.ds-body-sm {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-muted);
}

.ds-caption {
    font-size: 12px;
    line-height: 1.5;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.ds-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-color);
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.ds-highlight {
    color: var(--primary-color);
}


/* ── Buttons ── */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    letter-spacing: 0.5px;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.25s ease;
    text-decoration: none;
    line-height: 1;
    white-space: nowrap;
}

.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--focus-ring);
}

/* Primary */
.btn-primary {
    background: var(--primary-color);
    color: var(--bg-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(var(--primary-rgb), 0.35);
}

.btn-primary:active {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(0);
    box-shadow: none;
}

/* Secondary */
.btn-secondary {
    background: var(--bg-muted);
    color: var(--text-color);
    border-color: var(--border-color);
}

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

.btn-secondary:active {
    background: #d1d5db; /* one shade darker neutral – intentional */
}

/* Outline */
.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-light);
    color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-outline:active {
    background: rgba(var(--primary-rgb), 0.2);
}

/* Ghost */
.btn-ghost {
    background: transparent;
    color: var(--primary-color);
    border-color: transparent;
}

.btn-ghost:hover {
    background: var(--primary-light);
}

/* Disabled */
.btn:disabled,
.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
    transform: none !important;
    box-shadow: none !important;
}

/* Button Sizes */
.btn-sm {
    padding: 8px 18px;
    font-size: 13px;
}

.btn-lg {
    padding: 16px 36px;
    font-size: 16px;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-full);
}


/* ── Form Inputs ── */

.form-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-color);
}

.form-hint {
    font-size: 13px;
    color: var(--text-muted);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    font-family: inherit;
    color: var(--text-color);
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
    box-sizing: border-box;
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
}

/* Focus */
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--focus-ring);
    background: var(--bg-color);
}

/* Error */
.form-input.input-error,
.form-select.input-error,
.form-textarea.input-error {
    border-color: var(--error-color);
}

.form-input.input-error:focus,
.form-select.input-error:focus,
.form-textarea.input-error:focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.2);
}

.form-error-msg {
    font-size: 13px;
    color: var(--error-color);
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Success */
.form-input.input-success,
.form-select.input-success,
.form-textarea.input-success {
    border-color: var(--success-color);
}

.form-input.input-success:focus,
.form-select.input-success:focus,
.form-textarea.input-success:focus {
    box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.2);
}

.form-success-msg {
    font-size: 13px;
    color: var(--success-color);
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Textarea */
.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* Select */
.form-select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%236b7280' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
    cursor: pointer;
}


/* ── Cards ── */

.ui-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.ui-card:hover {
    box-shadow: var(--shadow-md);
    border-color: rgba(var(--primary-rgb), 0.3);
    transform: translateY(-2px);
}

.ui-card-flat {
    background: var(--bg-muted);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
}

.ui-card-accent {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
}


/* ── Alerts ── */

.alert {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 20px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    line-height: 1.5;
}

.alert-icon {
    flex-shrink: 0;
    font-size: 18px;
    margin-top: 1px;
}

.alert-success {
    background: var(--success-light);
    color: var(--success-color);
    border: 1px solid rgba(22, 163, 74, 0.25);
}

.alert-warning {
    background: var(--warning-light);
    color: var(--warning-color);
    border: 1px solid rgba(217, 119, 6, 0.25);
}

.alert-error {
    background: var(--error-light);
    color: var(--error-color);
    border: 1px solid rgba(220, 38, 38, 0.25);
}

.alert-info {
    background: var(--primary-light);
    color: var(--primary-dark);
    border: 1px solid rgba(var(--primary-rgb), 0.25);
}


/* ── Badges ── */

.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--radius-full);
    line-height: 1;
    letter-spacing: 0.3px;
}

.badge-primary {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.badge-success {
    background: var(--success-light);
    color: var(--success-color);
}

.badge-warning {
    background: var(--warning-light);
    color: var(--warning-color);
}

.badge-error {
    background: var(--error-light);
    color: var(--error-color);
}

.badge-neutral {
    background: var(--bg-muted);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}


/* ── Divider ── */

.ds-divider {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 32px 0;
}


/* ── Utility Classes ── */

.text-primary { color: var(--primary-color); }
.text-muted   { color: var(--text-muted); }
.text-success { color: var(--success-color); }
.text-warning { color: var(--warning-color); }
.text-error   { color: var(--error-color); }

.bg-primary-light { background: var(--primary-light); }
.bg-muted         { background: var(--bg-muted); }