:root {
    /* Základní firemní barvy */
    --ls-primary: #bf0d0d;
    --ls-primary-dark: #B01818;
    --ls-primary-light: #FF3B3B;
    --ls-white: #FFFFFF;
    --ls-dark: #212529;
    --ls-gray: #6C757D;
    --ls-light-gray: #F8F9FA;

    /* Rozměry layoutu */
    --sidebar-width: 280px;
    --header-height: 70px;
}

/* Základní layout */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: #f0f2f5;
}

/* Header a Navbar */
.header,
.navbar {
    height: var(--header-height);
    background-color: var(--ls-primary) !important;
    color: var(--ls-white);
    z-index: 1030;
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
}

/* Progress v headeru */
.header .progress,
.navbar .progress {
    background-color: rgba(255,255,255,0.2);
}

.header .text-muted,
.navbar .text-muted {
    color: rgba(255,255,255,0.8) !important;
}

.header .btn-outline-danger,
.navbar .btn-outline-danger {
    color: var(--ls-white);
    border-color: var(--ls-white);
}

.header .btn-outline-danger:hover,
.navbar .btn-outline-danger:hover {
    background-color: var(--ls-white);
    color: var(--ls-primary);
}

.header a,
.navbar a {
    color: var(--ls-white);
}

.header a:hover,
.navbar a:hover {
    color: rgba(255,255,255,0.8);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    background-color: var(--ls-primary);
    color: var(--ls-white);
    overflow-y: auto;
    z-index: 1020;
}

.sidebar .nav-link {
    color: rgba(255, 255, 255, 0.9);
    padding: 0.8rem 1rem;
    border-radius: 6px;
}

.sidebar .nav-link:hover:not(.active) {
    background-color: rgba(255, 255, 255, 0.1);
}

.sidebar .nav-link.active {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Main content */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--header-height);
    padding: 2rem;
}

/* Scrollbar pro sidebar */
.sidebar::-webkit-scrollbar {
    width: 5px;
}

.sidebar::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
}

.sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Karty */
.card {
    border: none;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.04);
}

/* Progress bar */
.progress {
    background-color: rgba(0,0,0,0.05);
}

.progress-bar {
    background-color: var(--ls-primary);
}

/* Tlačítka */
.btn-primary {
    background-color: var(--ls-primary);
    border-color: var(--ls-primary);
    color: var(--ls-white);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--ls-primary-dark);
    border-color: var(--ls-primary-dark);
    color: var(--ls-white);
}

.btn-outline-primary {
    color: var(--ls-primary);
    border-color: var(--ls-primary);
}

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

/* Text colors */
.text-primary {
    color: var(--ls-primary) !important;
}

/* Background colors */
.bg-primary {
    background-color: var(--ls-primary) !important;
}

/* Alerts */
.alert {
    border-radius: 8px;
    border: none;
    box-shadow: 0 2px 4px rgba(0,0,0,0.04);
}

.alert-primary {
    background-color: var(--ls-primary-light);
    color: var(--ls-primary);
}

/* Responzivní design */
@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .sidebar.show {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
    }

    .header,
    .navbar {
        width: 100%;
    }
}

/* Přihlašovací stránka */
.login-container {
    min-height: 100vh;
    background-color: var(--ls-light-gray);
    padding: 2rem;
}

.login-card {
    background: var(--ls-white);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 2rem;
}

/* Links */
a {
    color: var(--ls-primary);
    text-decoration: none;
}

a:hover {
    color: var(--ls-primary-dark);
}

/* Forms */
.form-control:focus {
    border-color: var(--ls-primary);
    box-shadow: 0 0 0 0.25rem rgba(220, 30, 30, 0.25);
}

#logo {
    width: 150px;
}

:root {
    /* Project color variables */
    --matching-primary: var(--ls-primary);
    --matching-primary-dark: var(--ls-primary-dark);
    --matching-primary-light: var(--ls-primary-light);
    --matching-white: var(--ls-white);
    --matching-dark: var(--ls-dark);
    --matching-gray: var(--ls-gray);
    --matching-light-gray: var(--ls-light-gray);
}

#matching-exercise {
    font-family: 'Inter', 'Roboto', sans-serif;
    background-color: var(--matching-light-gray);
}

.situation-answers {
    min-height: 4rem;
    border: 2px dashed rgba(191, 13, 13, 0.3);
    border-radius: 12px;
    transition: all 0.3s ease;
    background-color: rgba(191, 13, 13, 0.02);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.situation-answers.dragover {
    background-color: rgba(191, 13, 13, 0.1);
    border-color: var(--matching-primary);
    box-shadow: 0 0 15px rgba(191, 13, 13, 0.1);
}

.matching-answer-tag {
    display: inline-flex;
    align-items: center;
    background: var(--matching-primary);
    color: var(--matching-white);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    margin: 0.25rem;
    cursor: grab;
    user-select: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    font-weight: 500;
}

.matching-answer-tag:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 6px rgba(0,0,0,0.15);
}

.option-btn {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: var(--matching-white);
    border: 1px solid rgba(191, 13, 13, 0.2);
    border-radius: 50px;
    cursor: grab;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    color: var(--matching-primary-dark);
    font-weight: 500;
}

.option-btn:hover:not(.option-disabled) {
    background: var(--matching-primary);
    color: var(--matching-white);
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(191, 13, 13, 0.3);
}

.option-disabled {
    opacity: 0.4;
    cursor: not-allowed;
    filter: grayscale(100%);
    transform: scale(0.95);
}

.situation-header {
    background-color: rgba(191, 13, 13, 0.05) !important;
    border-left: 4px solid var(--matching-primary);
    transition: background-color 0.3s ease;
    color: var(--matching-primary-dark);
    font-weight: 600;
}

.situation-header:hover {
    background-color: rgba(191, 13, 13, 0.1) !important;
}

.correct-answer {
    background: rgba(25, 135, 84, 0.1) !important;
    border-color: #198754 !important;
}

.incorrect-answer {
    background: rgba(220, 53, 69, 0.1) !important;
    border-color: #dc3545 !important;
    animation: pulse-error 1s ease infinite;
}

@keyframes pulse-success {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(25, 135, 84, 0.4); }
    50% { transform: scale(1.02); box-shadow: 0 0 0 10px rgba(25, 135, 84, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(25, 135, 84, 0); }
}

@keyframes pulse-error {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(220, 53, 69, 0.4); }
    50% { transform: scale(1.02); box-shadow: 0 0 0 10px rgba(220, 53, 69, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(220, 53, 69, 0); }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .option-btn {
        width: 100%;
        text-align: center;
        margin-bottom: 0.5rem;
    }
}

/* Enhanced time display */
.time-display {
    background-color: rgba(191, 13, 13, 0.1);
    color: var(--matching-primary-dark);
    padding: 0.25rem 0.5rem;
    border-radius: 20px;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.time-display:hover {
    background-color: rgba(191, 13, 13, 0.2);
}

.matching-answer-tag {
    display: inline-flex;
    align-items: center;
    background: var(--matching-primary);
    color: var(--matching-white);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    margin: 0.25rem;
    cursor: grab;
    user-select: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    font-weight: 500;
}

.option-btn {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: rgba(191, 13, 13, 0.1);
    border: 1px solid rgba(191, 13, 13, 0.2);
    border-radius: 50px;
    cursor: grab;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    color: var(--matching-primary-dark);
    font-weight: 500;
}

.option-btn:hover:not(.option-disabled) {
    background: var(--matching-primary);
    color: var(--matching-white);
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(191, 13, 13, 0.3);
}

.situation-header {
    background-color: transparent !important;
    border-left: 4px solid var(--matching-primary);
    color: var(--matching-dark);
    font-weight: 600;
    transition: none;
}

.situation-header:hover {
    background-color: transparent !important;
}


.exercise-header {
    display: flex;
    background-color: transparent;
    gap: 1rem;
    margin-bottom: 1rem;
}

.exercise-header-left,
.exercise-header-right {
    display: flex;
    align-items: center;
    background-color: var(--ls-white);
    border-radius: 8px;
    padding: 0.75rem 1rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.exercise-header-left {
    flex-grow: 1;
}

.exercise-header-right {
    width: 150px;
    justify-content: center;
}

.exercise-timer {
    display: flex;
    align-items: center;
    color: #212529;
    font-weight: bold;
    font-size: 1.25rem;
}

.exercise-timer i {
    margin-right: 0.5rem;
    font-size: 1.5rem;
    color: var(--ls-primary);
}

.exercise-title {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.exercise-title-icon {
    background-color: var(--ls-primary);
    color: var(--ls-white);
    width: 50px;
    height: 50px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.exercise-title-icon i {
    font-size: 1.5rem;
}

.exercise-title-content {
    flex-grow: 1;
}

.exercise-title-content h1 {
    font-size: 1.25rem;
    color: black;
    margin-bottom: 0.25rem;
    font-weight: 700;
}

.exercise-title-content p {
    font-size: 0.875rem;
    color: var(--ls-gray);
    margin: 0;
}

/* Responzivní úpravy */
@media (max-width: 768px) {
    .exercise-header {
        flex-direction: column;
        gap: 0.75rem;
    }

    .exercise-header-right {
        width: 100%;
        justify-content: flex-start;
    }

    .exercise-title-icon {
        width: 40px;
        height: 40px;
    }

    .exercise-title-icon i {
        font-size: 1.25rem;
    }
}