/**
 * Calandus Shared Design System
 *
 * This file is enqueued by every Calandus plugin (main, birthdays, weather, clock).
 * It provides a single source of truth for colours, typography, buttons, and cards.
 *
 * DO NOT define colours, font sizes, or button styles in individual plugin CSS files.
 * Use the CSS custom properties defined here instead.
 */

/* ── Custom Properties (Design Tokens) ──────────────────────────────────── */
:root {
    /* Brand colours */
    --cal-primary:        #2563eb;   /* Blue - primary actions */
    --cal-primary-hover:  #1d4ed8;
    --cal-primary-light:  #eff6ff;   /* Very light blue tint */

    --cal-success:        #16a34a;
    --cal-success-light:  #dcfce7;
    --cal-warning:        #d97706;
    --cal-warning-light:  #fef3c7;
    --cal-danger:         #dc2626;
    --cal-danger-light:   #fef2f2;
    --cal-danger-hover:   #b91c1c;

    /* Neutrals */
    --cal-text:           #1e293b;   /* Headings / strong text */
    --cal-text-secondary: #334155;   /* Body text */
    --cal-text-muted:     #64748b;   /* Labels, hints */
    --cal-text-disabled:  #94a3b8;

    --cal-bg-page:        transparent;
    --cal-bg-card:        #f8fafc;   /* Card / section background */
    --cal-bg-white:       #ffffff;
    --cal-bg-input:       #ffffff;

    --cal-border:         #e2e8f0;   /* Subtle dividers */
    --cal-border-input:   #d1d5db;   /* Input borders */

    /* Card token */
    --cal-card-radius:    12px;
    --cal-card-shadow:    0 1px 4px rgba(0, 0, 0, 0.06);

    /* Typography */
    --cal-font:           -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --cal-font-mono:      ui-monospace, 'Cascadia Code', 'Fira Mono', 'Courier New', monospace;

    --cal-text-xs:        11px;
    --cal-text-sm:        12px;
    --cal-text-base:      14px;
    --cal-text-md:        15px;
    --cal-text-lg:        16px;
    --cal-text-xl:        18px;  /* h3 / section titles */
    --cal-text-2xl:       22px;  /* h2 / tab headings */
    --cal-text-3xl:       28px;  /* h1 / page headings */

    /* Spacing */
    --cal-space-1:        4px;
    --cal-space-2:        8px;
    --cal-space-3:        12px;
    --cal-space-4:        16px;
    --cal-space-5:        20px;
    --cal-space-6:        24px;
    --cal-space-8:        32px;

    /* Border radius */
    --cal-radius-sm:      4px;
    --cal-radius-md:      6px;
    --cal-radius-lg:      8px;
    --cal-radius-xl:      12px;

    /* Button sizing */
    --cal-btn-height:     40px;
    --cal-btn-height-sm:  32px;
    --cal-btn-padding:    0 20px;
    --cal-btn-padding-sm: 0 14px;
    --cal-btn-font-size:  14px;
    --cal-btn-font-weight: 500;
    --cal-btn-radius:     8px;
}

/* ── Typography Resets ──────────────────────────────────────────────────── */
/* Applied to all calandus plugin wrappers */
.calandus-dashboard,
.calandus-birthdays-container,
.calandus-weather-settings-container,
.calandus-clock-settings-container,
.calandus-screen-manager,
.calandus-my-devices-container {
    font-family: var(--cal-font);
    font-size: var(--cal-text-base);
    color: var(--cal-text-secondary);
    line-height: 1.5;
}

/* Heading scale — shared by all plugins */
.calandus-h1,
.calandus-dashboard .dashboard-welcome h1 {
    font-size: var(--cal-text-3xl);
    font-weight: 700;
    color: var(--cal-text);
    margin: 0 0 12px;
    line-height: 1.2;
}

.calandus-h2,
.calandus-dashboard .tab-section h2,
.calandus-screen-manager h2 {
    font-size: var(--cal-text-2xl);
    font-weight: 700;
    color: var(--cal-text);
    margin: 0 0 20px;
    line-height: 1.3;
}

.calandus-h3,
.calandus-dashboard .tab-section h3,
.calandus-dashboard .settings-group h3,
.calandus-dashboard .calandus-form .form-section h3,
.calandus-birthday-form-section h3,
.calandus-birthday-list-section h3,
.calandus-weather-settings-form h3,
.calandus-my-devices-container h2,
.calandus-my-devices-container h3 {
    font-size: var(--cal-text-xl);
    font-weight: 600;
    color: var(--cal-text);
    margin: 0 0 16px;
    line-height: 1.4;
}

.calandus-h4,
.calandus-dashboard .screen-info h4,
.calandus-dashboard .device-option-card h4,
.calandus-dashboard .instructions-box h4 {
    font-size: var(--cal-text-lg);
    font-weight: 600;
    color: var(--cal-text);
    margin: 0 0 4px;
    line-height: 1.4;
}

/* ── Card Token ─────────────────────────────────────────────────────────── */
/* Reusable utility class — use on any section box */
.cal-card {
    background: var(--cal-bg-card);
    border-radius: var(--cal-card-radius);
    box-shadow: var(--cal-card-shadow);
    padding: var(--cal-space-4);
}

/* ── Button System ──────────────────────────────────────────────────────── */
/* Base button reset — apply to ALL buttons across plugins */
.calandus-btn,
.cal-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: var(--cal-btn-height);
    padding: var(--cal-btn-padding);
    font-family: var(--cal-font);
    font-size: var(--cal-btn-font-size);
    font-weight: var(--cal-btn-font-weight);
    line-height: 1;
    border: none;
    border-radius: var(--cal-btn-radius);
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.2s ease, opacity 0.2s ease, transform 0.1s ease;
    white-space: nowrap;
    box-sizing: border-box;
}

.calandus-btn:active,
.cal-btn:active {
    transform: scale(0.98);
}

/* Primary */
.calandus-btn-primary,
.cal-btn-primary {
    background: var(--cal-primary);
    color: #ffffff;
}

.calandus-btn-primary:hover,
.cal-btn-primary:hover {
    background: var(--cal-primary-hover);
    color: #ffffff;
    text-decoration: none;
}

/* Secondary / ghost */
.calandus-btn-secondary,
.cal-btn-secondary {
    background: var(--cal-bg-white);
    color: var(--cal-text-secondary);
    box-shadow: inset 0 0 0 1px var(--cal-border);
}

.calandus-btn-secondary:hover,
.cal-btn-secondary:hover {
    background: var(--cal-bg-card);
    color: var(--cal-text);
    text-decoration: none;
}

/* Danger */
.calandus-btn-danger,
.cal-btn-danger {
    background: var(--cal-danger);
    color: #ffffff;
}

.calandus-btn-danger:hover,
.cal-btn-danger:hover {
    background: var(--cal-danger-hover);
    color: #ffffff;
    text-decoration: none;
}

/* Small variant */
.calandus-btn-sm,
.cal-btn-sm {
    height: var(--cal-btn-height-sm);
    padding: var(--cal-btn-padding-sm);
    font-size: var(--cal-text-sm);
    border-radius: 6px;
}

/* Disabled state */
.calandus-btn:disabled,
.cal-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Full-width modifier */
.calandus-btn-block,
.cal-btn-block {
    width: 100%;
}

/* ── Form Elements ──────────────────────────────────────────────────────── */
.cal-label {
    display: block;
    margin-bottom: 5px;
    font-size: var(--cal-text-base);
    font-weight: 500;
    color: var(--cal-text-secondary);
}

.cal-input,
.cal-select,
.cal-textarea {
    display: block;
    width: 100%;
    padding: 9px 12px;
    font-family: var(--cal-font);
    font-size: var(--cal-text-base);
    color: var(--cal-text);
    background: var(--cal-bg-input);
    border: 1px solid var(--cal-border-input);
    border-radius: var(--cal-radius-md);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    box-sizing: border-box;
    line-height: 1.5;
}

.cal-input:focus,
.cal-select:focus,
.cal-textarea:focus {
    outline: none;
    border-color: var(--cal-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ── Feedback Messages ──────────────────────────────────────────────────── */
.cal-message {
    padding: 12px 16px;
    border-radius: var(--cal-radius-lg);
    font-size: var(--cal-text-base);
    margin-bottom: 16px;
}

.cal-message-success {
    background: var(--cal-success-light);
    color: #15803d;
    border: 1px solid #bbf7d0;
}

.cal-message-error {
    background: var(--cal-danger-light);
    color: #991b1b;
    border: 1px solid #fecaca;
}

.cal-message-warning {
    background: var(--cal-warning-light);
    color: #92400e;
    border: 1px solid #fde68a;
}

/* ── Divider ────────────────────────────────────────────────────────────── */
.cal-divider {
    border: none;
    border-top: 1px solid var(--cal-border);
    margin: var(--cal-space-6) 0;
}

/* ── Responsive utilities ───────────────────────────────────────────────── */
@media (max-width: 768px) {
    :root {
        --cal-text-3xl: 22px;
        --cal-text-2xl: 18px;
        --cal-text-xl:  16px;
    }
}