/* ═══════════════════════════════════════════════════════
   COMPONENTS — Buttons, Cards, Badges
   ═══════════════════════════════════════════════════════ */

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 14px 28px;
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: var(--font-weight-semibold);
    line-height: 1;
    text-align: center;
    border: var(--border-width) solid transparent;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition-fast);
    white-space: nowrap;
}

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

/* Primary — Microsoft Blue */
.btn-primary {
    background-color: var(--color-secondary);
    color: var(--color-text-inverse);
    border-color: var(--color-secondary);
}

.btn-primary:hover {
    background-color: #106EBE;
    border-color: #106EBE;
}

/* Secondary — TCS Navy Outline */
.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

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

.btn-ghost:hover {
    background-color: rgba(0, 120, 212, 0.08);
}

/* Sizes */
.btn-sm {
    padding: 10px 20px;
    font-size: 13px;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 15px;
}

/* ── Container ── */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

/* ── Section ── */
.section {
    padding-top: var(--space-4xl);
    padding-bottom: var(--space-4xl);
}

.section--surface {
    background-color: var(--color-surface);
}

/* ── Section Header ── */
.section-header {
    text-align: center;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: var(--space-3xl);
}

.section-header__label {
    display: inline-block;
    font-size: 12px;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-secondary);
    margin-bottom: var(--space-md);
}

.section-header__title {
    margin-bottom: var(--space-md);
}

.section-header__description {
    font-size: 17px;
    color: var(--color-text-secondary);
}

/* ── Card ── */
.card {
    background-color: var(--color-white);
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--space-xl);
    transition: var(--transition-fast);
}

.card:hover {
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-md);
}

.card--surface {
    background-color: var(--color-surface);
    border-color: transparent;
}

.card--surface:hover {
    background-color: var(--color-white);
    border-color: var(--color-secondary);
}

/* ── Scroll to Top Button ── */
.scroll-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-secondary);
    color: var(--color-text-inverse);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-fast);
    z-index: 999;
    box-shadow: var(--shadow-md);
}

.scroll-top:hover {
    background-color: #106EBE;
    transform: translateY(0);
}

.scroll-top:focus-visible {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}

.scroll-top--visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
}

/* ── Theme Toggle Button ── */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: none;
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition-fast);
    color: var(--color-text-secondary);
}

.theme-toggle:hover {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
    background-color: var(--color-surface);
}

.theme-toggle:focus-visible {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}

.theme-toggle__icon {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
}

.theme-toggle__icon--sun {
    display: block;
}

.theme-toggle__icon--moon {
    display: none;
}

.dark .theme-toggle__icon--sun {
    display: none;
}

.dark .theme-toggle__icon--moon {
    display: block;
}