* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Times New Roman', Times, serif;
    background: #000000;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

/*
.container {
    text-align: center;
    background: #000000;
    padding: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
*/
.controls {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    justify-content: center;
}

.controls-row {
    display: flex;
    align-items: center;
    gap: 30px;
    flex-wrap: wrap;
    justify-content: center;
}



#themeBtn {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    padding: min(1.5vw, 20px) min(3.5vw, 45px);
    border-radius: 30px;
    cursor: pointer;
    font-family: 'Orbitron', monospace;
    font-size: min(1.5vw, 20px);
    transition: all 0.3s ease;
}



#themeBtn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}





h1 {
    display: none;
}

.clock {
    background: #000000;
    padding: 20px 40px;
    border: none;
}

#time {
    width: 100%;
    font-size: min(20vw, 290px);
    color: #DC143C;
    font-weight: 700;
    letter-spacing: min(2.5vw, 40px);
    font-family: 'Orbitron', 'Share Tech Mono', monospace;
    white-space: nowrap;
    line-height: 1.2;
    text-align: center;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    height: auto;
}


#date {
    font-size: min(7vw, 100px);
    color: inherit;
    font-family: 'Orbitron', 'Share Tech Mono', monospace;
    font-weight: 650;
    text-align: center;
    margin: 0 auto;
    margin-top: min(5vw, 80px);
    letter-spacing: min(0.7vw, 10px);
    text-shadow: inherit;
}

#dayOfWeek {
    font-size: min(4vw, 60px);
    color: inherit;
    font-family: 'Orbitron', 'Share Tech Mono', monospace;
    font-weight: 400;
    text-align: center;
    margin: 0 auto;
    margin-top: min(2vw, 30px);
    letter-spacing: min(0.5vw, 8px);
    text-shadow: inherit;
    text-transform: capitalize;
}

/* Téma 1 - Zelená (výchozí) */
/*.theme-green body {
    background: #000000;
}*/
.theme-green #time {
    color: #0a980ab8;
    text-shadow: 
        0 0 calc(2vw * var(--brightness, 1)) #584097be,
        0 0 calc(4vw * var(--brightness, 2)) #9e0000ac,
        0 0 calc(8vw * var(--brightness, 3)) #1939ba6b,
        0 0 calc(16vw * var(--brightness, 4)) #3c3874b4;
}
.theme-green #date {
    color: #0a980ab8;
    text-shadow: 
        0 0 calc(2vw * var(--brightness, 1)) #584097be,
        0 0 calc(4vw * var(--brightness, 2)) #9e1717ac,
        0 0 calc(8vw * var(--brightness, 3)) #1939ba6b,
        0 0 calc(16vw * var(--brightness, 4)) #76140bb4;
}

.theme-green #dayOfWeek {
    color: #0a980ab8;
    text-shadow: 
        0 0 calc(1vw * var(--brightness, 1)) #584097be,
        0 0 calc(2vw * var(--brightness, 2)) #9e1717ac,
        0 0 calc(4vw * var(--brightness, 3)) #1939ba6b,
        0 0 calc(8vw * var(--brightness, 4)) #76140bb4;
}

/* Téma 2 - Modrá */
/*.theme-blue body {
    background: #001122;
}*/
.theme-blue #time {
    color: #00ffff58;
    text-shadow: 
        0 0 calc(2vw * var(--brightness, 1)) #7e71a8,
        0 0 calc(4vw * var(--brightness, 2)) #16808036,
        0 0 calc(8vw * var(--brightness, 3)) #290424,
        0 0 calc(16vw * var(--brightness, 4)) #331a6e;
}
.theme-blue #date {
    color: #00ffff58;
    text-shadow: 
        0 0 calc(2vw * var(--brightness, 1)) #7e71a8,
        0 0 calc(4vw * var(--brightness, 2)) #16808036,
        0 0 calc(8vw * var(--brightness, 3)) #290424,
        0 0 calc(16vw * var(--brightness, 4)) #331a6e;
}

.theme-blue #dayOfWeek {
    color: #00ffff58;
    text-shadow: 
        0 0 calc(1vw * var(--brightness, 1)) #7e71a8,
        0 0 calc(2vw * var(--brightness, 2)) #16808036,
        0 0 calc(4vw * var(--brightness, 3)) #290424,
        0 0 calc(8vw * var(--brightness, 4)) #331a6e;
}

/* Téma 3 - Žlutá */
/*.theme-yellow body {
    background: #910c0c;
}*/
.theme-yellow #time {
    color: #0fbd3284;
    text-shadow: 
        0 0 calc(2vw * var(--brightness, 1)) #99350a8c,
        0 0 calc(4vw * var(--brightness, 2)) #023024,
        0 0 calc(8vw * var(--brightness, 3)) #5341ba,
        0 0 calc(16vw * var(--brightness, 4)) #c06011;
}
.theme-yellow #date {
    color: #098d8d84;
    text-shadow: 
        0 0 calc(2vw * var(--brightness, 1)) #99350a8c,
        0 0 calc(4vw * var(--brightness, 2)) #023024,
        0 0 calc(8vw * var(--brightness, 3)) #2a7208,
        0 0 calc(16vw * var(--brightness, 4)) #c06011;
}

.theme-yellow #dayOfWeek {
    color: #a97f8484;
    text-shadow: 
        0 0 calc(1vw * var(--brightness, 1)) #99350a8c,
        0 0 calc(2vw * var(--brightness, 2)) #023024,
        0 0 calc(4vw * var(--brightness, 3)) #2a7208,
        0 0 calc(8vw * var(--brightness, 4)) #c06011;
}


/* Responzivní design pro různé velikosti obrazovek */

/* Velké obrazovky (desktop) - nad 1200px */
@media (min-width: 1200px) {
    #time {
        font-size: min(15vw, 280px);
        letter-spacing: min(1.5vw, 30px);
        height: auto;
        line-height: 1.2;
    }
    
    #date {
        font-size: min(5vw, 90px);
        letter-spacing: min(0.5vw, 12px);
        margin-top: 50px;
    }
    
    #dayOfWeek {
        font-size: min(3vw, 54px);
        letter-spacing: min(0.4vw, 9px);
        margin-top: 25px;
    }
    
    #themeBtn {
        padding: 18px 40px;
        font-size: 18px;
    }
    
    .controls {
        bottom: 60px;
    }
}

/* Extra velké monitory - nad 1600px */
@media (min-width: 1600px) {
    #time {
        font-size: min(12vw, 320px);
        letter-spacing: min(1.2vw, 35px);
    }
    
    #date {
        font-size: min(4vw, 100px);
        letter-spacing: min(0.4vw, 15px);
        margin-top: 60px;
    }
    
    #dayOfWeek {
        font-size: min(2.5vw, 62px);
        letter-spacing: min(0.3vw, 11px);
        margin-top: 30px;
    }
    
    #themeBtn {
        padding: 20px 45px;
        font-size: 20px;
    }
    
    .controls {
        bottom: 80px;
    }
}

/* Ultra široké monitory - nad 2000px */
@media (min-width: 2000px) {
    #time {
        font-size: min(10vw, 350px);
        letter-spacing: min(1vw, 40px);
    }
    
    #date {
        font-size: min(3.5vw, 110px);
        letter-spacing: min(0.35vw, 18px);
        margin-top: 70px;
    }
    
    #themeBtn {
        padding: 22px 50px;
        font-size: 22px;
    }
    
    .controls {
        bottom: 100px;
    }
}

/* 4K monitory - nad 2560px */
@media (min-width: 2560px) {
    #time {
        font-size: min(8vw, 380px);
        letter-spacing: min(0.8vw, 45px);
    }
    
    #date {
        font-size: min(3vw, 120px);
        letter-spacing: min(0.3vw, 20px);
        margin-top: 80px;
    }
    
    #themeBtn {
        padding: 25px 55px;
        font-size: 24px;
    }
    
    .controls {
        bottom: 120px;
    }
}

/* Střední obrazovky (tablety na šířku) - 768px až 1199px */
@media (min-width: 768px) and (max-width: 1199px) {
    #time {
        font-size: 25vw;
        letter-spacing: 10vw;
        height: auto;
        line-height: 1.5;
    }
    
    #date {
        font-size: 7vw;
        letter-spacing: 0.8vw;
        margin-top: 40px;
    }
    
    #themeBtn {
        padding: 20px 40px;
        font-size: 20px;
    }
}

/* Malé obrazovky (tablety na výšku, velké telefony) - 481px až 767px */
@media (max-width: 767px) {
    .controls {
        bottom: 30px;
    }
    
    #time {
        font-size: 20vw;
        letter-spacing: 2vw;
        height: auto;
        line-height: 1.1;
    }
    
    #date {
        font-size: 8vw;
        letter-spacing: 0.8vw;
        margin-top: 30px;
    }
    
    #themeBtn {
        padding: 12px 25px;
        font-size: 14px;
    }
}

/* Realme 8 5G a podobné velké telefony - 360px až 480px */
@media (min-width: 360px) and (max-width: 480px) {
    .controls {
        bottom: 25px;
    }
    
    #time {
        font-size: 18vw;
        letter-spacing: 1.6vw;
        height: auto;
        line-height: 1;
    }
    
    #date {
        font-size: 7vw;
        letter-spacing: 0.6vw;
        margin-top: 25px;
    }
    
    #themeBtn {
        padding: 12px 24px;
        font-size: 13px;
    }
    
    .clock {
        padding: 15px 25px;
    }
}

/* Velmi malé obrazovky (malé telefony) - do 480px */
@media (max-width: 480px) {
    .controls {
        bottom: 20px;
    }
    
    #time {
        font-size: 18vw;
        letter-spacing: 1.8vw;
        height: auto;
        line-height: 1;
    }
    
    #date {
        font-size: 7vw;
        letter-spacing: 0.6vw;
        margin-top: 20px;
    }
    
    #themeBtn {
        padding: 10px 20px;
        font-size: 12px;
    }
}

/* iPhone 5 a podobná velmi malá zařízení - do 320px */
@media (max-width: 320px) {
    .controls {
        bottom: 15px;
    }
    
    #time {
        font-size: 22vw;
        letter-spacing: 1.5vw;
        height: auto;
        line-height: 0.9;
    }
    
    #date {
        font-size: 9vw;
        letter-spacing: 0.5vw;
        margin-top: 15px;
    }
    
    #dayOfWeek {
        font-size: 6vw;
        letter-spacing: 0.4vw;
        margin-top: 10px;
    }
    
    #themeBtn {
        padding: 8px 16px;
        font-size: 10px;
        border-radius: 20px;
    }
    
    .clock {
        padding: 5px 10px;
    }
}

/* Orientace na výšku pro mobilní zařízení */
@media (max-width: 767px) and (orientation: portrait) {
    .clock {
        padding: 10px 20px;
    }
    
    #time {
        font-size: 22vw;
        letter-spacing: 2vw;
    }
    
    #date {
        font-size: 8vw;
        margin-top: 25px;
    }
}

/* Realme 8 5G na výšku - optimalizace pro velký displej */
@media (min-width: 360px) and (max-width: 480px) and (orientation: portrait) {
    .clock {
        padding: 20px 30px;
    }
    
    #time {
        font-size: 19vw;
        letter-spacing: 1.5vw;
        line-height: 0.95;
    }
    
    #date {
        font-size: 7.5vw;
        letter-spacing: 0.5vw;
        margin-top: 30px;
    }
    
    #dayOfWeek {
        font-size: 4.8vw;
        letter-spacing: 0.4vw;
        margin-top: 18px;
    }
    
    .controls {
        bottom: 40px;
    }
    
    #themeBtn {
        padding: 14px 28px;
        font-size: 14px;
    }
}

/* iPhone 5 na výšku - speciální optimalizace */
@media (max-width: 320px) and (orientation: portrait) {
    .clock {
        padding: 5px 10px;
    }
    
    #time {
        font-size: 24vw;
        letter-spacing: 1.2vw;
        line-height: 0.85;
    }
    
    #date {
        font-size: 10vw;
        letter-spacing: 0.4vw;
        margin-top: 10px;
    }
    
    .controls {
        bottom: 10px;
    }
    
    #themeBtn {
        padding: 6px 12px;
        font-size: 9px;
    }
}

/* Orientace na šířku pro mobilní zařízení */
@media (max-width: 767px) and (orientation: landscape) {
    .controls {
        bottom: 15px;
    }
    
    #time {
        font-size: 15vh;
        letter-spacing: 1.2vh;
    }
    
    #date {
        font-size: 6vh;
        letter-spacing: 0.5vh;
        margin-top: 15px;
    }
}

/* Realme 8 5G na šířku - optimalizace pro široký displej */
@media (min-width: 640px) and (max-height: 480px) and (orientation: landscape) {
    .controls {
        bottom: 20px;
    }
    
    #time {
        font-size: 12vh;
        letter-spacing: 0.8vh;
        line-height: 0.9;
    }
    
    #date {
        font-size: 5vh;
        letter-spacing: 0.3vh;
        margin-top: 12px;
    }
    
    #themeBtn {
        padding: 10px 20px;
        font-size: 12px;
    }
    
    .clock {
        padding: 10px 25px;
    }
}

/* iPhone 5 na šířku - speciální optimalizace */
@media (max-width: 568px) and (max-height: 320px) and (orientation: landscape) {
    .controls {
        bottom: 8px;
    }
    
    #time {
        font-size: 18vh;
        letter-spacing: 1vh;
        line-height: 0.9;
    }
    
    #date {
        font-size: 7vh;
        letter-spacing: 0.3vh;
        margin-top: 8px;
    }
    
    #themeBtn {
        padding: 4px 10px;
        font-size: 8px;
    }
    
    .clock {
        padding: 2px 10px;
    }
}