/* Components and UI Layout — Industrial Inventory Standard */
@import url('tokens.css');

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    background-color: var(--background);
    color: var(--on-surface);
    font-family: var(--font-ui);
    font-size: 14px;
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Mobile App Shell (Centered container on desktop, 100% on mobile) */
.mobile-shell {
    max-width: 480px;
    margin: 0 auto;
    min-height: 100vh;
    background-color: var(--background);
    display: flex;
    flex-direction: column;
    position: relative;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.05);
}

/* Top App Header */
.app-header {
    background-color: var(--surface-container-lowest);
    border-bottom: 1px solid var(--outline-variant);
    padding: 12px 16px;
    position: sticky;
    top: 0;
    z-index: 40;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-brand {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-brand img, .header-brand svg {
    width: 24px;
    height: 24px;
}

.location-picker-btn {
    background: var(--surface-container-low);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius);
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--on-surface);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    max-width: 200px;
}

.location-picker-btn:hover {
    border-color: var(--outline);
}

/* Main Content Area */
.app-main {
    flex: 1;
    padding: 16px;
    padding-bottom: 84px; /* clearance for bottom nav */
}

/* Horizontal Date Strip / Carousel */
.date-strip-container {
    margin: -16px -16px 16px -16px;
    padding: 12px 16px;
    background: var(--surface-container-lowest);
    border-bottom: 1px solid var(--outline-variant);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.date-strip-container::-webkit-scrollbar {
    display: none;
}

.date-strip {
    display: flex;
    gap: 8px;
    min-width: min-content;
}

.date-chip {
    background: var(--surface-container-low);
    border: 1px solid var(--outline-variant);
    border-radius: var(--radius);
    padding: 8px 12px;
    min-width: 58px;
    text-align: center;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    transition: all 0.15s ease;
    user-select: none;
}

.date-chip:hover {
    border-color: var(--primary);
}

.date-chip.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--on-primary);
}

.date-chip.active .date-dow,
.date-chip.active .date-num {
    color: var(--on-primary);
}

.date-dow {
    font-size: 11px;
    font-weight: 700;
    color: var(--on-surface-variant);
    text-transform: uppercase;
}

.date-num {
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 700;
    color: var(--on-surface);
}

.date-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    margin-top: 2px;
    background-color: var(--outline-variant);
}

.date-dot.dot-available { background-color: var(--success); }
.date-dot.dot-low { background-color: var(--warning); }
.date-dot.dot-full { background-color: var(--outline); }
.date-dot.dot-booked { background-color: var(--primary); }

/* Shift Cards */
.shift-card {
    background: var(--surface-container-lowest);
    border: 1px solid var(--outline-variant);
    border-left: 4px solid var(--shift-color, var(--primary));
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 12px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    position: relative;
}

.shift-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.shift-title-group {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.shift-label {
    font-size: 16px;
    font-weight: 700;
    color: var(--on-surface);
}

.shift-times {
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 600;
    color: var(--on-surface-variant);
    display: flex;
    align-items: center;
    gap: 6px;
}

.shift-meta-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    padding-top: 4px;
    border-top: 1px solid var(--surface-container-high);
}

.spots-chip {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.spots-chip.spots-open {
    background: var(--success-container);
    color: var(--on-success-container);
}

.spots-chip.spots-low {
    background: var(--warning-container);
    color: var(--on-warning-container);
}

.spots-chip.spots-none {
    background: var(--surface-container-high);
    color: var(--on-surface-variant);
}

.reason-text {
    font-size: 12px;
    color: var(--error);
    margin-top: 4px;
    line-height: 1.4;
}

/* Primary and Secondary Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.15s ease;
    text-decoration: none;
    min-height: 44px; /* Touch target minimum */
}

.btn-primary {
    background: var(--primary);
    color: var(--on-primary);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-container);
}

.btn-secondary {
    background: transparent;
    border-color: var(--outline);
    color: var(--on-surface);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--surface-container-high);
}

.btn-danger {
    background: var(--error);
    color: var(--on-error);
}

.btn-danger:hover:not(:disabled) {
    background: #93000A;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Bottom Tab Navigation */
.app-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    max-width: 480px;
    margin: 0 auto;
    background: var(--surface-container-lowest);
    border-top: 1px solid var(--outline-variant);
    display: flex;
    height: 64px;
    z-index: 50;
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    font-size: 11px;
    font-weight: 600;
    color: var(--on-surface-variant);
    text-decoration: none;
    cursor: pointer;
    border: none;
    background: transparent;
    position: relative;
}

.nav-item.active {
    color: var(--primary);
}

.nav-item.active::after {
    content: '';
    position: absolute;
    top: 0;
    left: 20%;
    right: 20%;
    height: 3px;
    background: var(--primary);
    border-radius: 0 0 2px 2px;
}

/* Forms and Inputs */
.form-group {
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--on-surface-variant);
    letter-spacing: 0.05em;
}

.form-input {
    background: var(--surface-container-lowest);
    border: 1px solid var(--outline);
    border-radius: var(--radius);
    padding: 10px 12px;
    font-family: var(--font-ui);
    font-size: 14px;
    color: var(--on-surface);
    min-height: 44px;
    outline: none;
}

.form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary);
}

.form-input.input-mono {
    font-family: var(--font-mono);
    letter-spacing: 0.1em;
    font-size: 18px;
    text-align: center;
}

/* Modal / Bottom Sheet Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(25, 28, 33, 0.4);
    backdrop-filter: blur(8px);
    z-index: 100;
    display: flex;
    align-items: flex-end;
    justify-content: center;
}

@media (min-width: 480px) {
    .modal-overlay {
        align-items: center;
        padding: 24px;
    }
}

.modal-dialog {
    background: var(--surface-container-lowest);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius) var(--radius) 0 0;
    width: 100%;
    max-width: 480px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    animation: slideUp 0.2s ease-out;
}

@media (min-width: 480px) {
    .modal-dialog {
        border-radius: var(--radius);
    }
}

@keyframes slideUp {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--outline-variant);
    padding-bottom: 12px;
}

.modal-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--on-surface);
}

.modal-close {
    background: transparent;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--on-surface-variant);
}

/* Toasts */
.toast-container {
    position: fixed;
    bottom: 76px;
    left: 16px;
    right: 16px;
    max-width: 448px;
    margin: 0 auto;
    z-index: 110;
    display: flex;
    flex-direction: column;
    gap: 8px;
    pointer-events: none;
}

.toast {
    background: var(--inverse-surface);
    color: var(--inverse-on-surface);
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    pointer-events: auto;
    animation: fadeIn 0.15s ease;
}

.toast.toast-error {
    background: var(--error);
    color: var(--on-error);
}

.toast.toast-success {
    background: var(--success);
    color: var(--on-success);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 48px 16px;
    color: var(--on-surface-variant);
}

.empty-state-icon {
    font-size: 36px;
    margin-bottom: 12px;
}

.empty-state-text {
    font-size: 14px;
    margin-bottom: 16px;
}

/* Shown only when scripts are blocked, so the page states what is wrong
   instead of rendering an empty shell. */
.noscript-banner {
    margin: 16px;
    padding: 16px;
    background: var(--warning-container);
    color: var(--on-warning-container);
    border: 1px solid var(--warning);
    border-radius: var(--radius);
    font-size: 14px;
    line-height: 1.5;
}