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

body {
    font-family: 'Inter', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
    background-image: url("theBackGround.jpg");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    display: flex;
    flex-direction: column;
    color: white;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.content {
    position: relative;
    z-index: 2;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.header {
    padding: 40px;
}

.logo {
    font-size: 48px;
    font-weight: 300;
    letter-spacing: 2px;
    margin-bottom: 5px;
}

.author {
    font-size: 14px;
    opacity: 0.8;
    font-weight: 300;
}

.main-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    min-height: calc(100vh - 120px);
    padding-bottom: 100px;
}

.session-input-container {
    margin-bottom: 30px;
}

.session-input {
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 12px;
    padding: 12px 24px;
    font-size: 18px;
    color: white;
    text-align: center;
    outline: none;
    backdrop-filter: blur(10px);
    width: 400px;
    max-width: 90vw;
}

.session-input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.mode-selector {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
}

.mode-btn {
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 25px;
    padding: 12px 30px;
    font-size: 16px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.mode-btn:hover {
    background: rgba(255, 255, 255, 0.25);
}

.mode-btn.active {
    background: rgba(138, 43, 226, 0.8);
    border-color: rgba(138, 43, 226, 1);
}

.time-presets {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
    justify-content: center;
}

.preset-option {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    padding: 10px 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.preset-option:hover {
    background: rgba(255, 255, 255, 0.25);
}

.preset-option.selected {
    background: rgba(138, 43, 226, 0.8);
    border-color: rgba(138, 43, 226, 1);
}

.preset-checkbox {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.preset-label {
    font-size: 16px;
    cursor: pointer;
}

.timer-display {
    font-size: 130px;
    font-family: Georgia, 'Times New Roman', Times, serif;
    font-weight: 300;
    letter-spacing: 5px;
    margin-bottom: 50px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 10px 20px;
    border-radius: 15px;
}

.timer-display:hover {
    background: rgba(255, 255, 255, 0.1);
}

.timer-display.editing {
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.4);
    outline: none;
}

.timer-hint {
    font-size: 14px;
    opacity: 0.7;
    margin-top: -35px;
    margin-bottom: 35px;
}

.controls {
    display: flex;
    gap: 20px;
}

.control-btn {
    background: rgba(138, 43, 226, 0.8);
    border: none;
    border-radius: 50px;
    padding: 18px 40px;
    font-size: 18px;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    font-weight: 500;
}

.control-btn:hover {
    background: rgba(138, 43, 226, 1);
    transform: scale(1.05);
}

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: scale(1);
}

.control-btn.secondary {
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.control-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.25);
}

.youtube-toggle {
    position: fixed;
    bottom: 40px;
    right: 40px;
    z-index: 10;
    background: rgba(255, 255, 255, 0.15);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.youtube-toggle:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.1);
}

.youtube-toggle.active {
    background: rgba(138, 43, 226, 0.8);
    border-color: rgba(138, 43, 226, 1);
}

.youtube-toggle svg {
    width: 28px;
    height: 28px;
    fill: white;
}

.youtube-player-container {
    position: fixed;
    bottom: 120px;
    left: 40px;
    z-index: 100;
    background: rgba(0, 0, 0, 0.8);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.youtube-player-container.minimized {
    width: auto;
}

.youtube-header {
    background: rgba(138, 43, 226, 0.9);
    padding: 10px 15px;
    cursor: move;
    display: flex;
    align-items: center;
    justify-content: space-between;
    user-select: none;
}

.youtube-header-title {
    font-size: 14px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.youtube-header-title svg {
    width: 20px;
    height: 20px;
    fill: white;
}

.youtube-controls {
    display: flex;
    gap: 8px;
}

.youtube-control-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 4px;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.youtube-control-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.youtube-control-btn svg {
    width: 16px;
    height: 16px;
    fill: white;
}

.youtube-content {
    transition: all 0.3s ease;
}

.youtube-content.hidden {
    display: none;
}

.youtube-search {
    padding: 15px;
    background: rgba(0, 0, 0, 0.5);
}

.youtube-search-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    padding: 8px 12px;
    color: white;
    font-size: 13px;
    outline: none;
}

.youtube-search-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.youtube-player {
    width: 400px;
    height: 225px;
}

@media (max-width: 768px) {
    .timer-display {
        font-size: 80px;
    }

    .logo {
        font-size: 36px;
    }

    .controls {
        flex-direction: column;
        width: 100%;
    }

    .control-btn {
        width: 100%;
    }

    .time-presets {
        max-width: 90vw;
    }

    .youtube-toggle {
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
    }

    .youtube-toggle svg {
        width: 24px;
        height: 24px;
    }

    .youtube-player-container {
        bottom: 80px;
        left: 20px;
    }

    .youtube-player {
        width: 300px;
        height: 169px;
    }
}

/* iPad Mini (768px x 1024px) */
@media only screen 
  and (min-width: 768px) 
  and (max-width: 834px) 
  and (orientation: portrait) {
    body {
        overflow-y: auto;
    }

    .main-container {
        padding-top: 10px;
        padding-bottom: 100px;
        min-height: auto;
    }

    .header {
        padding: 25px 40px 15px 40px;
    }

    .logo {
        font-size: 48px;
    }

    .author {
        font-size: 15px;
    }

    .session-input-container {
        margin-bottom: 20px;
    }

    .session-input {
        width: 450px;
        font-size: 18px;
        padding: 12px 24px;
    }

    .mode-selector {
        margin-bottom: 25px;
    }

    .mode-btn {
        font-size: 16px;
        padding: 12px 30px;
    }

    .time-presets {
        margin-bottom: 25px;
    }

    .preset-option {
        padding: 10px 20px;
    }

    .preset-label {
        font-size: 16px;
    }

    .timer-display {
        font-size: 110px;
        margin-bottom: 35px;
    }

    .timer-hint {
        font-size: 14px;
        margin-top: -25px;
        margin-bottom: 35px;
    }

    .controls {
        gap: 15px;
    }

    .control-btn {
        font-size: 18px;
        padding: 18px 45px;
    }

    .youtube-player-container {
        bottom: 120px;
        left: 50px;
    }

    .youtube-player {
        width: 400px;
        height: 225px;
    }

    .youtube-toggle {
        bottom: 45px;
        right: 50px;
        width: 65px;
        height: 65px;
    }

    .youtube-toggle svg {
        width: 30px;
        height: 30px;
    }
}

/* iPad Mini Landscape */
@media only screen 
  and (min-width: 768px) 
  and (max-width: 1024px) 
  and (orientation: landscape) {
    .timer-display {
        font-size: 120px;
    }

    .youtube-player {
        width: 400px;
        height: 225px;
    }
}

/* iPad Air (820px x 1180px) */
@media only screen 
  and (min-width: 820px) 
  and (max-width: 1024px) 
  and (orientation: portrait) {
    body {
        overflow-y: auto;
    }

    .main-container {
        padding-top: 10px;
        padding-bottom: 120px;
        min-height: auto;
    }

    .header {
        padding: 30px 40px 20px 40px;
    }

    .logo {
        font-size: 52px;
    }

    .author {
        font-size: 16px;
    }

    .session-input-container {
        margin-bottom: 25px;
    }

    .session-input {
        width: 500px;
        font-size: 20px;
        padding: 14px 28px;
    }

    .mode-selector {
        margin-bottom: 30px;
    }

    .mode-btn {
        font-size: 18px;
        padding: 14px 35px;
    }

    .time-presets {
        margin-bottom: 30px;
    }

    .preset-option {
        padding: 12px 22px;
    }

    .preset-label {
        font-size: 18px;
    }

    .timer-display {
        font-size: 130px;
        margin-bottom: 40px;
    }

    .timer-hint {
        font-size: 16px;
        margin-top: -30px;
        margin-bottom: 40px;
    }

    .controls {
        gap: 15px;
    }

    .control-btn {
        font-size: 20px;
        padding: 20px 50px;
    }

    .youtube-player-container {
        bottom: 150px;
        left: 60px;
    }

    .youtube-player {
        width: 450px;
        height: 253px;
    }

    .youtube-toggle {
        bottom: 60px;
        right: 60px;
        width: 70px;
        height: 70px;
    }

    .youtube-toggle svg {
        width: 34px;
        height: 34px;
    }

    .youtube-search-input {
        font-size: 15px;
        padding: 10px 14px;
    }
}

/* iPad Air Landscape */
@media only screen 
  and (min-width: 1024px) 
  and (max-width: 1180px) 
  and (orientation: landscape) {
    .timer-display {
        font-size: 140px;
    }

    .youtube-player {
        width: 450px;
        height: 253px;
    }
}