/* ==== VARIABLES ==== */
:root {
    --color-primary: #FF6F61;
    --color-secondary: #E05A4E;
    --color-font: #fff;
    --color-shadow: #D3544F;
    --border-radius: 2rem;
    --transition-timing: 1s ease;
}

:root.break-mode {
    --color-primary: #4F8A8B;
    --color-secondary: #3B6B6C;
    --color-shadow: #3A5F60;
}

/* ==== BASE STYLES ==== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 62.5%;
}

body {
    font-family: system-ui, -apple-system, sans-serif;
    color: var(--color-font);
    transition: background var(--transition-timing);
}

button:focus {
    outline: none;
}

/* ==== LAYOUT ==== */
.pomodoro-timer {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100dvh;
    padding: 2rem;
    background: var(--color-primary);
    gap: 3rem;
}

.main-timer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    width: 100%;
}

/* ==== COMPONENTS ======= */

/* HEADER */
h1 {
    font-size: clamp(2.4rem, 5vw, 3.2rem);
    font-weight: 600;
    text-align: center;
    text-wrap: balance;
}

/* MODE PANEL */
.panel {
    display: flex;
    width: min(100%, 40rem);
    border-radius: var(--border-radius);
    box-shadow: 0 0.4rem 1.5rem var(--color-shadow);
    overflow: hidden;
    background: rgba(0, 0, 0, 0.1);
}

.mode-buttons {
    flex: 1;
    padding: 1.5rem;
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    text-align: center;
    text-transform: lowercase;
    cursor: pointer;
    transition: all var(--transition-timing);
    border: none;
    background: transparent;
    color: var(--color-font);
}

.mode-buttons.active {
    background-color: var(--color-secondary);
    text-transform: uppercase;
    font-weight: 600;
}

/* TIMER DISPLAY */
.timer {
    position: relative;
    width: min(80vw, 30rem);
    aspect-ratio: 1 / 1;
}

.circle {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--color-secondary);
    border: 1rem solid var(--color-font);
    box-shadow: 0 0.4rem 1.5rem var(--color-shadow);
}


.time {
    display: flex;
    gap: 0.8rem;
    font-variant-numeric: tabular-nums;

}

.time>p {
    font-size: clamp(3rem, 15vw, 6rem);
    font-weight: 600;
    line-height: 1;
}

/* CONTROLS */
.controls {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

#start {
    border: none;
    padding: 1rem 2.5rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    background: var(--color-secondary);
    color: var(--color-font);
    font-size: clamp(1.6rem, 3vw, 2rem);
    transition: all var(--transition-timing);
    min-width: 12rem;
}

#start:hover {
    background: var(--color-shadow);
    transform: translateY(-0.2rem);
}

#start:active {
    transform: translateY(0);
}

#start:disabled {
    background: #ccc;
    color: #666;
    cursor: not-allowed;
    opacity: 0.7;
    transform: none;
}

/* ==== RESPONSIVE ======= */
@media (max-width: 768px) {
    .pomodoro-timer {
        gap: 2rem;
        padding: 1.5rem;
    }

    .mode-buttons {
        padding: 1.2rem;
    }

    .circle {
        border-width: 0.8rem;
    }

    #start {
        min-width: 10rem;
        padding: 0.8rem 2rem;
    }
}

@media (max-width: 480px) {

    .time>p {
        font-size: 3.6rem;
    }

    .controls {
        gap: 1rem;
    }

    #start {
        min-width: 8rem;
        padding: 0.8rem 1.5rem;
    }
}

/* ================== */
/* =-============= */
/* To-Do List Styles */
.todo-container {
    width: min(100%, 50rem);
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-top: 2rem;
}

.todo-container h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.input-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

#task-input {
    flex: 1;
    padding: 1.2rem;
    border: none;
    border-radius: var(--border-radius);
    background: var(--color-secondary);
    color: var(--color-font);
    font-size: 1.6rem;
}

#task-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

#add-btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    background: var(--color-secondary);
    color: var(--color-font);
    cursor: pointer;
    transition: all var(--transition-timing);
}

#add-btn:hover {
    background: var(--color-shadow);
    transform: translateY(-0.2rem);
}

#task-area {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.task {
    display: flex;
    align-items: center;
    padding: 1.2rem;
    background: var(--color-secondary);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    cursor: pointer;
}

.task.complete {
    opacity: 0.7;
    text-decoration: line-through;
}

.task span {
    flex: 1;
    font-size: 1.6rem;
}