:root {
    --primary-color: #8a2be2;
    --secondary-color: #3c90fc;
    --accent-color: #ff7675;
    --text-color: #ffffff;
    --text-color-muted: rgba(255, 255, 255, 0.7);
    --background-color: #13151f;
    --background-gradient: linear-gradient(135deg, #13151f, #232946);
    --button-hover-color: #9b59b6;
    --split-bg-color: rgba(255, 255, 255, 0.08);
    --tab-bg-color: rgba(255, 255, 255, 0.07);
    --tab-active-bg-color: rgba(255, 255, 255, 0.15);
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    --glow-effect: 0 0 15px rgba(138, 43, 226, 0.6);
    --border-radius-sm: 6px;
    --border-radius-md: 12px;
    --border-radius-lg: 24px;
    --border-radius-xl: 50px;
    --spacing-xs: 0.4rem;
    --spacing-sm: 0.8rem;
    --spacing-md: 1.2rem;
    --spacing-lg: 1.8rem;
    --spacing-xl: 2.5rem;
    --font-size-sm: 0.9rem;
    --font-size-md: 1.1rem;
    --font-size-lg: 1.4rem;
    --font-size-xl: 2.4rem;
    --font-size-xxl: 5rem;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
}

body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    background: var(--background-gradient);
    color: var(--text-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: background 0.6s ease;
    overflow-x: hidden;
    position: relative;
}

.container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-xl) var(--spacing-xl);
    background: rgba(25, 30, 50, 0.85);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow),
                inset 0 0 30px rgba(138, 43, 226, 0.1);
    margin: var(--spacing-xl) auto;
    max-width: 650px;
    width: 90%;
    position: relative;
    transition: var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.1);
    animation: fadeIn 0.8s ease;
    margin-bottom: calc(var(--spacing-xl) * 2);
}

.container:hover {
    box-shadow: var(--glow-effect), var(--box-shadow);
}

/* Style dla zakładek */
.tabs-wrapper {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    width: 100%;
    margin-bottom: 2.5rem;
    overflow-x: auto;
    padding: 0.8rem 0.4rem;
    scrollbar-width: thin;
    scrollbar-color: var(--secondary-color) transparent;
    position: relative;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

.tabs-wrapper::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--secondary-color) 50%, transparent);
    opacity: 0.6;
}

.tabs-wrapper::-webkit-scrollbar {
    height: 4px;
}

.tabs-wrapper::-webkit-scrollbar-thumb {
    background-color: var(--secondary-color);
    border-radius: 4px;
}

.tabs-wrapper::-webkit-scrollbar-track {
    background: transparent;
}

#tabs-container {
    display: flex;
    gap: 0.4rem;
    flex-grow: 1;
}

.tab {
    display: flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--tab-bg-color);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
    white-space: nowrap;
    position: relative;
    min-width: 110px;
    justify-content: space-between;
    border: 1px solid rgba(255, 255, 255, 0.05);
    font-size: var(--font-size-sm);
    user-select: none;
    gap: var(--spacing-xs);
}

.tab:hover {
    background: var(--tab-active-bg-color);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.tab-name-container {
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
    padding: var(--spacing-xs);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    cursor: pointer;
    gap: 4px;
}

.tab-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    white-space: nowrap;
}

.tab-name:hover {
    background: rgba(255, 255, 255, 0.1);
}

.tab-close {
    font-size: 1.2rem;
    line-height: 1;
    color: rgba(255, 255, 255, 0.7);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: transparent;
    border: none;
    padding: 0;
    cursor: pointer;
    opacity: 0.7;
}

.tab-close:hover {
    color: #ff5252;
    background: rgba(255, 82, 82, 0.2);
    transform: rotate(90deg);
    opacity: 1;
}

.tab.active {
    background: linear-gradient(45deg, 
        rgba(138, 43, 226, 0.2), 
        rgba(60, 144, 252, 0.2)
    );
    font-weight: 600;
    box-shadow: var(--glow-effect);
    border: 1px solid rgba(138, 43, 226, 0.3);
    transform: translateY(-1px);
}

.tab.active .tab-name-container {
    background: rgba(255, 255, 255, 0.05);
}

.tab.active:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-effect), 0 4px 12px rgba(0, 0, 0, 0.3);
}

.tab-edit-icon {
    width: 16px;
    height: 16px;
    opacity: 0.5;
    margin-right: 0.5rem;
    transition: all 0.2s ease;
    display: none;
}

.tab:hover .tab-edit-icon {
    display: inline-block;
    animation: fadeIn 0.3s ease;
}

.tab.active .tab-edit-icon {
    opacity: 0.8;
}

.tab-edit-icon:hover {
    opacity: 1;
    transform: scale(1.2) rotate(15deg);
}

.add-tab-btn {
    padding: 0.6rem;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: var(--text-color);
    font-size: 1.4rem;
    cursor: pointer;
    border: none;
    transition: all 0.3s ease;
    flex-shrink: 0;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}

.add-tab-btn:hover {
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 5px 15px rgba(138, 43, 226, 0.4);
}

.tab-edit-input {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    border: 1px solid var(--secondary-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: inherit;
    font-family: inherit;
    box-sizing: border-box;
    outline: none;
    transition: var(--transition-fast);
}

.tab-edit-input:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(138, 43, 226, 0.25);
}

.tab.editing {
    pointer-events: none;
}

.tab.editing .tab-name-container {
    pointer-events: all;
    background: rgba(255, 255, 255, 0.05);
}

.tab-name-container.editing {
    z-index: 1;
}

#display {
    font-size: var(--font-size-xxl);
    font-weight: 300;
    margin-bottom: var(--spacing-xl);
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.4),
                 0 0 30px rgba(138, 43, 226, 0.3);
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: var(--transition-normal);
    letter-spacing: 2px;
    position: relative;
    font-family: 'Roboto Mono', monospace;
}

#display::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 70%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent-color), transparent);
}

.button-container {
    display: flex;
    gap: 1.8rem;
    margin-bottom: 2rem;
}

button {
    font-size: var(--font-size-md);
    font-weight: 500;
    padding: var(--spacing-md) var(--spacing-xl);
    cursor: pointer;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: var(--text-color);
    border: none;
    border-radius: var(--border-radius-xl);
    transition: var(--transition-slow);
    box-shadow: var(--box-shadow),
                inset 0 0 20px rgba(255, 255, 255, 0.1);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

button:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: all 0.6s ease;
}

button:hover:before {
    left: 100%;
}

button:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3),
                inset 0 0 20px rgba(255, 255, 255, 0.2);
}

button:active {
    transform: translateY(-2px);
}

#startStop {
    background: linear-gradient(45deg, #8a2be2, #3c90fc);
}

#split {
    background: linear-gradient(45deg, #4a6efa, #38b6ff);
}

#reset {
    background: linear-gradient(45deg, #fc5c65, #eb3b5a);
}

#splitTimes {
    flex-grow: 1;
    overflow-y: auto;
    width: 100%;
    padding: 1.2rem;
    box-sizing: border-box;
    max-height: 350px;
    scrollbar-width: thin;
    scrollbar-color: var(--secondary-color) var(--background-color);
    margin-top: 1rem;
}

#splitTimes::-webkit-scrollbar {
    width: 8px;
}

#splitTimes::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

#splitTimes::-webkit-scrollbar-thumb {
    background-color: var(--secondary-color);
    border-radius: 20px;
}

.split-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--split-bg-color);
    border-radius: var(--border-radius-md);
    transition: var(--transition-normal);
    border-left: 3px solid var(--primary-color);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.split-item:hover {
    background-color: rgba(255, 255, 255, 0.12);
}

.split-item:nth-child(even) {
    border-left: 3px solid var(--secondary-color);
}

.edit-icon {
    cursor: pointer;
    margin-left: 1rem;
    opacity: 0.7;
    transition: all 0.4s ease;
}

.edit-icon:hover {
    opacity: 1;
    transform: scale(1.1) rotate(15deg);
}

.edit-input {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    border: 1px solid var(--secondary-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: inherit;
    font-family: inherit;
    width: 100%;
    min-width: 80px;
    outline: none;
    transition: var(--transition-fast);
}

.edit-input:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(138, 43, 226, 0.25);
}

/* Animacje */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.03); }
    100% { transform: scale(1); }
}

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

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes glow {
    0% { 
        text-shadow: 0 0 10px rgba(138, 43, 226, 0.5),
                     0 0 20px rgba(60, 144, 252, 0.3);
    }
    50% { 
        text-shadow: 0 0 20px rgba(138, 43, 226, 0.8),
                     0 0 40px rgba(60, 144, 252, 0.6),
                     0 0 60px rgba(255, 118, 117, 0.4);
    }
    100% { 
        text-shadow: 0 0 10px rgba(138, 43, 226, 0.5),
                     0 0 20px rgba(60, 144, 252, 0.3);
    }
}

.running #display {
    animation: glow 1.5s infinite, pulse 1.5s infinite;
    text-shadow: 0 0 20px rgba(138, 43, 226, 0.5),
                 0 0 40px rgba(60, 144, 252, 0.3);
}

/* Responsywność */
@media (max-width: 650px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-lg: 1.5rem;
        --spacing-md: 1rem;
        --spacing-sm: 0.6rem;
        --font-size-xxl: 3.5rem;
        --font-size-xl: 2rem;
        --font-size-lg: 1.2rem;
        --font-size-md: 1rem;
        --font-size-sm: 0.85rem;
    }
    
    .container {
        padding: var(--spacing-lg) var(--spacing-md);
        margin: var(--spacing-md) auto;
        width: 95%;
    }
    
    #display {
        font-size: var(--font-size-xxl);
        margin-bottom: var(--spacing-xl);
    }
    
    .button-container {
        gap: var(--spacing-sm);
        flex-wrap: wrap;
        justify-content: center;
    }
    
    button {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .tab {
        padding: var(--spacing-xs) var(--spacing-sm);
        min-width: 90px;
    }
    
    .split-item {
        padding: var(--spacing-sm);
    }
    
    .app-title {
        font-size: 2rem;
    }
    
    .split-times-container {
        padding: 1rem;
    }
    
    .split-header {
        font-size: 1.1rem;
    }
}

.app-header {
    text-align: center;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.8rem;
}

.app-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 3px;
}

.app-title {
    font-size: 2.4rem;
    font-weight: 700;
    margin: 0;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 1px;
}

.version {
    font-size: 1rem;
    font-weight: 400;
    opacity: 0.7;
    vertical-align: super;
}

.timer-display-wrapper {
    position: relative;
    padding: var(--spacing-lg) var(--spacing-md);
    margin: var(--spacing-md) 0 var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    background: rgba(0, 0, 0, 0.2);
    width: 100%;
    text-align: center;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.3),
                0 0 20px rgba(138, 43, 226, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

#startStop .fa-play, #startStop .fa-pause {
    margin-right: 6px;
}

#startStop.running .fa-play {
    display: none;
}

#startStop:not(.running) .fa-pause {
    display: none;
}

.split-times-container {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-top: var(--spacing-xl);
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.split-header {
    margin-top: 0;
    margin-bottom: 1.2rem;
    font-size: 1.2rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.split-header i {
    margin-right: 8px;
    color: var(--accent-color);
}

/* Style dla głównego elementu footer */
footer {
    /* Pozycjonowanie - wyśrodkowanie i przylgnięcie do dołu */
    margin: auto 0 0 auto;
    width: 100%;
    max-width: 100vw;
    box-sizing: border-box;
    position: relative;
    left: 50%;
    transform: translateX(-50%);
    /* Efekty wizualne */
    background: linear-gradient(to bottom, transparent, rgba(0, 0, 0, 0.2));
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    /* Dodatkowe efekty dla lepszego wyglądu */
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

/* Style dla kontenera wewnętrznego footer-bottom */
.footer-bottom {
    /* Podstawowe pozycjonowanie tekstu */
    text-align: center;
    padding: 1.5rem;
    /* Dodatkowe właściwości dla lepszego wyglądu */
    position: relative;
    z-index: 1;
}

    /* Style dla tekstu w stopce (element p) */
    .footer-bottom p {
        /* Wygląd tekstu */
        font-size: 0.9rem;
        color: rgba(255, 255, 255, 0.6);
        margin: 0; /* Usuwa domyślne marginesy paragrafu */
        line-height: 1.6;
        font-weight: 400;
        /* Efekt hover dla interaktywności */
        transition: color 0.3s ease;
    }

        /* Efekt hover dla tekstu stopki */
        .footer-bottom p:hover {
            color: rgba(255, 255, 255, 0.8);
        }

/* Opcjonalny efekt dekoracyjny nad stopką */
footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(138, 43, 226, 0.5), transparent);
}

/* Responsywność dla mniejszych ekranów */
@media (max-width: 650px) {
    .footer-bottom {
        padding: 1rem;
    }

        .footer-bottom p {
            font-size: 0.85rem;
        }
}

/* Nowe style dla przycisków */
.button-clicked {
    transform: scale(0.95) !important;
    opacity: 0.9;
}

/* Poprawione style dla wyłączonych przycisków */
button:disabled,
.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    background: linear-gradient(45deg, #555, #777) !important;
    box-shadow: none !important;
}

button:disabled:hover,
.disabled:hover {
    transform: none !important;
    box-shadow: none !important;
}

/* Style dla międzyczasów */
.split-info {
    display: flex;
    align-items: center;
    flex: 1;
    min-width: 0;
}

.split-number {
    font-weight: 500;
    background: rgba(138, 43, 226, 0.2);
    padding: 0.3rem 0.6rem;
    border-radius: 50px;
    margin-right: 0.8rem;
    font-size: 0.9rem;
}

.split-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    cursor: text;
}

.split-name:hover {
    background: rgba(255, 255, 255, 0.1);
}

.split-name:hover::after {
    content: '✎';
    position: absolute;
    right: 8px;
    opacity: 0.5;
}

.split-time {
    font-weight: 700;
    color: var(--accent-color);
    margin: 0 var(--spacing-md);
    font-family: 'Roboto Mono', monospace;
    font-size: var(--font-size-md);
    letter-spacing: 1px;
    flex-shrink: 0;
    text-shadow: 0 0 10px rgba(255, 118, 117, 0.3);
}

.split-name .edit-input {
    width: 100%;
    min-width: 80px;
    max-width: 150px;
    margin: 0;
    font-size: 0.9rem;
}

.split-actions {
    display: flex;
    align-items: center;
}

.no-splits {
    text-align: center;
    padding: 2rem 1rem;
    color: rgba(255, 255, 255, 0.5);
    font-style: italic;
}

/* Animacje dla zakładek */
.running-tab {
    animation: tabPulse 1.5s infinite;
}

.rotate-animation {
    animation: rotate360 0.5s ease;
}

@keyframes tabPulse {
    0% { border-color: rgba(138, 43, 226, 0.3); }
    50% { border-color: rgba(255, 118, 117, 0.6); }
    100% { border-color: rgba(138, 43, 226, 0.3); }
}

@keyframes rotate360 {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Kolorystyka przycisków */
#startStop.running {
    background: linear-gradient(45deg, #eb3b5a, #fc5c65);
}

/* Style dla edycji w trakcie */
.editing {
    background: rgba(255, 255, 255, 0.15) !important;
    border-radius: var(--border-radius-sm);
}

.editing input {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: inherit;
    font-family: inherit;
    padding: 0;
    margin: 0;
    outline: none;
}

/* Animacja dla pola edycji */
@keyframes fadeInEdit {
    from { opacity: 0; transform: translateY(-2px); }
    to { opacity: 1; transform: translateY(0); }
}

.editing input {
    animation: fadeInEdit 0.2s ease-out;
}

/* Style dla przycisku w trakcie kliknięcia */
.button-clicked {
    transform: scale(0.95) !important;
    opacity: 0.9;
}

/* Poprawione style dla wyłączonych przycisków */
button:disabled,
.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    background: linear-gradient(45deg, #555, #777) !important;
    box-shadow: none !important;
}

button:disabled:hover,
.disabled:hover {
    transform: none !important;
    box-shadow: none !important;
}

.tab-edit-button {
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.5);
    font-size: 1rem;
    padding: 4px;
    margin-right: 4px;
    cursor: pointer;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.tab-edit-button:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    transform: scale(1.1);
}

.tab-edit-button:active {
    transform: scale(0.95);
}

.tab.active .tab-edit-button {
    color: rgba(255, 255, 255, 0.7);
}