/* ===== Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    min-height: 100vh;
    color: #1a1a1a;
    padding: 20px;
}

body::before {
    background-image: none!important;
}

/* ===== Container ===== */
.container {
    max-width: 800px;
    margin: 0 auto;
}

/* ===== Header ===== */
.header {
    text-align: center;
    margin-bottom: 32px;
    padding: 24px;
}

.header__title {
    color: #fff;
    font-size: clamp(28px, 5vw, 40px);
    font-weight: 700;
    margin-bottom: 8px;
}

.header__subtitle {
    color: rgba(255, 255, 255, 0.7);
    font-size: clamp(14px, 2vw, 16px);
}

/* ===== Main Card ===== */
.main {
    background: #fff;
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

/* ===== Input Section ===== */
.input-section {
    margin-bottom: 24px;
}

.input-section__label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: #1a1a1a;
}

.input-section__row {
    display: flex;
    gap: 8px;
}

@media (max-width: 575px) {
    .input-section__row {
        flex-direction: column;
    }
}

.input-section__input {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    outline: none;
}

.input-section__input:focus {
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.input-section__hint {
    font-size: 13px;
    color: #888;
    margin-top: 8px;
}

/* ===== Buttons ===== */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn--primary {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: #fff;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4);
}

.btn--secondary {
    background: #f3f4f6;
    color: #1a1a1a;
}

.btn--secondary:hover {
    background: #e5e7eb;
}

.btn--ghost {
    background: transparent;
    color: #6b7280;
    border: 1px solid #e0e0e0;
}

.btn--ghost:hover {
    background: #f9fafb;
    color: #1a1a1a;
}

/* ===== Options Section ===== */
.options-section {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 20px;
    background: #f9fafb;
    border-radius: 12px;
    margin-bottom: 24px;
}

@media (max-width: 575px) {
    .options-section {
        grid-template-columns: 1fr;
    }
}

.option {
    display: flex;
    flex-direction: column;
}

.option__label {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #4b5563;
}

.option__range {
    width: 100%;
    accent-color: #6366f1;
}

.option__select,
.option__color {
    padding: 8px 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    background: #fff;
    cursor: pointer;
    transition: border-color 0.2s ease;
    outline: none;
}

.option__select:focus,
.option__color:focus {
    border-color: #6366f1;
}

.option__color {
    height: 42px;
    padding: 4px;
}

/* ===== Output Section ===== */
.output-section {
    text-align: center;
}

.output-section__preview {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 320px;
    padding: 24px;
    background: #f9fafb;
    border-radius: 12px;
    margin-bottom: 16px;
}

.output-section__preview canvas,
.output-section__preview img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

.output-section__placeholder {
    text-align: center;
    color: #9ca3af;
}

.output-section__placeholder svg {
    margin-bottom: 12px;
}

.output-section__placeholder p {
    font-size: 14px;
}

.output-section__actions {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== History Section ===== */
.history-section {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid #e5e7eb;
}

.history-section__title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: #1a1a1a;
}

.history-section__list {
    list-style: none;
    margin-bottom: 16px;
    max-height: 240px;
    overflow-y: auto;
}

.history-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    margin-bottom: 8px;
    transition: background-color 0.2s ease;
}

.history-item:hover {
    background: #f9fafb;
}

.history-item__url {
    flex: 1;
    font-size: 14px;
    color: #4b5563;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-right: 12px;
    cursor: pointer;
}

.history-item__url:hover {
    color: #6366f1;
}

.history-item__delete {
    background: transparent;
    border: none;
    color: #ef4444;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.history-item__delete:hover {
    background: #fee2e2;
}

/* ===== Toast Notification ===== */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #1a1a1a;
    color: #fff;
    padding: 12px 24px;
    border-radius: 8px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
    z-index: 1000;
}

.toast--visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}