/* ==========================================================================
   Terminbuchung Wizard — Design System
   Lohnsteuerhilfeverein Flensburg e.V.
   ========================================================================== */

/* --- Reset & Base --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Brand */
    --color-primary: #023e8a;
    --color-primary-hover: #012d6b;
    --color-primary-light: #0077b6;
    --color-accent: #059669;

    /* Text */
    --color-heading: #0f172a;
    --color-body: #334155;
    --color-muted: #64748b;

    /* Surfaces */
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-surface-alt: #f1f5f9;
    --color-info-bg: #f0f9ff;

    /* Borders */
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;

    /* Shadows */
    --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.1),
                   0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-btn: 0 1px 3px rgba(0, 0, 0, 0.08),
                  0 1px 2px rgba(0, 0, 0, 0.06);
    --shadow-btn-hover: 0 4px 12px rgba(2, 62, 138, 0.2);

    /* Radii */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-smooth: 0.3s ease-out;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-body);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: var(--space-md);
}


/* --- Wizard Card (Main Container) --- */

.wizard {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
    max-width: 760px;
    width: 100%;
    overflow: hidden;
}


/* --- Header --- */

.wizard-header {
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
    text-align: center;
}

.wizard-header__logo {
    display: flex;
    align-items: center;
    justify-content: center;
}

.wizard-header__logo img {
    height: 44px;
    width: auto;
    object-fit: contain;
}

.wizard-header .subtitle {
    font-size: 0.6875rem;
    color: var(--color-muted);
    margin-top: var(--space-sm);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}


/* --- Step Content Area --- */

.wizard-body {
    padding: var(--space-xl);
}


/* --- Steps --- */

.step {
    display: none;
}

.step.active {
    display: block;
    animation: stepFadeIn 0.3s ease-out;
}

@keyframes stepFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}


/* --- Typography --- */

.step-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-heading);
    text-align: center;
    margin-bottom: var(--space-lg);
    line-height: 1.4;
}


/* --- Button Grid --- */

.btn-grid {
    display: grid;
    gap: var(--space-md);
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    margin-top: var(--space-lg);
}

.btn-grid--single {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}


/* --- Buttons --- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0.75rem 1.5rem;
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 500;
    line-height: 1.4;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-btn);
}

.btn:focus-visible {
    outline: 2px solid var(--color-primary-light);
    outline-offset: 2px;
}

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

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

.btn-primary:active {
    transform: translateY(0);
}

/* Secondary */
.btn-secondary {
    background-color: var(--color-surface);
    color: var(--color-primary);
    border: 1px solid var(--color-border);
    box-shadow: none;
}

.btn-secondary:hover {
    background-color: var(--color-surface-alt);
    border-color: #cbd5e1;
    transform: translateY(-1px);
}

.btn-secondary:active {
    transform: translateY(0);
}

/* Ghost (restart) */
.btn-ghost {
    background: transparent;
    color: var(--color-muted);
    border: 1px solid var(--color-border);
    box-shadow: none;
    font-size: 0.8125rem;
    min-height: 40px;
    padding: 0.5rem 1.25rem;
}

.btn-ghost:hover {
    color: var(--color-body);
    border-color: #cbd5e1;
    background-color: var(--color-surface-alt);
}


/* --- Info Box --- */

.info-box {
    background-color: var(--color-info-bg);
    border-left: 4px solid var(--color-primary);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    padding: var(--space-lg);
    margin: var(--space-lg) 0;
    text-align: left;
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--color-body);
}

.info-box p {
    margin-bottom: var(--space-md);
}

.info-box p:last-child {
    margin-bottom: 0;
}

.info-box a {
    color: var(--color-primary-light);
    text-decoration: underline;
    text-underline-offset: 2px;
    transition: color var(--transition-fast);
}

.info-box a:hover {
    color: var(--color-primary);
}

.info-box strong {
    color: var(--color-heading);
}

.info-box h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

.info-box hr {
    border: 0;
    border-top: 1px solid var(--color-border);
    margin: var(--space-md) 0;
}

/* Address card inside info-box */
.info-box .address-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    margin: var(--space-sm) 0;
}


/* --- Calendar Section --- */

.calendar-section {
    margin-top: var(--space-lg);
}

.calendar-wrapper {
    position: relative;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    background-color: var(--color-surface);
    min-height: 700px;
}

.calendar-wrapper iframe {
    width: 100%;
    height: 700px;
    border: none;
    display: block;
}

.calendar-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    color: var(--color-muted);
    gap: var(--space-md);
}

.calendar-placeholder .spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.calendar-placeholder p {
    font-size: 0.875rem;
}


/* --- Fallback Link --- */

.fallback-link {
    text-align: center;
    margin-top: var(--space-md);
    font-size: 0.8125rem;
    color: var(--color-muted);
}

.fallback-link a {
    color: var(--color-primary-light);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.fallback-link a:hover {
    color: var(--color-primary);
}


/* --- Step Navigation --- */

.step-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.step-nav--left {
    justify-content: flex-start;
}


/* --- Result Footer --- */

.result-footer {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}


/* --- Progress Indicator --- */

.wizard-progress {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl) 0;
}

.wizard-progress .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--color-border);
    transition: all var(--transition-base);
}

.wizard-progress .dot.active {
    background-color: var(--color-primary);
    width: 24px;
    border-radius: 4px;
}


/* --- Responsive --- */

@media (max-width: 640px) {
    body {
        padding: 0;
        align-items: flex-start;
    }

    .wizard {
        border-radius: 0;
        box-shadow: none;
        min-height: 100vh;
    }

    .wizard-header {
        padding: var(--space-md) var(--space-lg);
    }

    .wizard-header__logo img {
        height: 36px;
    }

    .wizard-body {
        padding: var(--space-lg);
    }

    .btn-grid {
        grid-template-columns: 1fr;
    }

    .step-title {
        font-size: 1.125rem;
    }

    .calendar-wrapper,
    .calendar-wrapper iframe {
        min-height: 500px;
        height: 500px;
    }
}

@media (min-width: 641px) and (max-width: 900px) {
    .wizard-body {
        padding: var(--space-xl) var(--space-lg);
    }

    .btn-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}