:root {
    --bg-gradient: linear-gradient(135deg, #1a2a6c 0%, #b21f1f 50%, #fdbb2d 100%);
    --card-bg: rgba(255, 255, 255, 0.08);
    --card-border: rgba(255, 255, 255, 0.15);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --accent: #00d2ff;
    --danger: #ff4e50;
    --success: #11ffbd;
    --glass-blur: blur(20px);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    min-height: 100vh;
    background: var(--bg-gradient);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    background-attachment: fixed;
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    padding: 2rem 1rem;
}

@keyframes gradientBG {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.container {
    width: 100%;
    max-width: 800px;
    z-index: 1;
}

header {
    margin-bottom: 3rem;
    text-align: center;
}

h1 {
    font-size: 3.5rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    margin-bottom: 0.5rem;
    background: linear-gradient(to bottom, #fff, #aaa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.search-container {
    margin-bottom: 2.5rem;
    position: relative;
}

#searchInput {
    width: 100%;
    padding: 1.25rem 2rem;
    border-radius: 2rem;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    color: white;
    font-size: 1.1rem;
    outline: none;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

#searchInput:focus {
    border-color: var(--accent);
    box-shadow: 0 0 40px rgba(0, 210, 255, 0.3);
    transform: scale(1.02);
}

.add-section {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 2rem;
    border-radius: 2rem;
    border: 1px solid var(--card-border);
    margin-bottom: 3rem;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

input[type="text"],
textarea {
    width: 100%;
    padding: 1rem 1.5rem;
    border-radius: 1rem;
    border: 1px solid var(--card-border);
    background: rgba(0, 0, 0, 0.3);
    color: white;
    outline: none;
    transition: border-color 0.3s;
}

input[type="text"]:focus,
textarea:focus {
    border-color: var(--accent);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

.btn {
    padding: 1rem 2rem;
    border-radius: 1rem;
    border: none;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.btn-primary {
    background: linear-gradient(90deg, #00d2ff 0%, #3a7bd5 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(0, 210, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 210, 255, 0.6);
}

.list-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.phrase-card {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 1.5rem;
    border-radius: 1.5rem;
    border: 1px solid var(--card-border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.phrase-card:hover {
    transform: translateY(-5px) scale(1.02);
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--accent);
}

.phrase-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.phrase-title {
    font-weight: 800;
    font-size: 1.2rem;
    background: linear-gradient(to right, #fff, var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.phrase-content {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    white-space: pre-wrap;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.phrase-actions {
    display: flex;
    gap: 0.75rem;
}

.btn-icon {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    color: white;
    padding: 0.6rem;
    border-radius: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: rotate(15deg);
}

.btn-delete:hover {
    color: var(--danger);
    border-color: var(--danger);
}

.toast {
    position: fixed;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid var(--accent);
    color: white;
    padding: 1rem 2.5rem;
    border-radius: 3rem;
    font-weight: 700;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    opacity: 0;
    z-index: 1000;
}

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

@media (max-width: 600px) {
    h1 {
        font-size: 2.5rem;
    }

    .list-container {
        grid-template-columns: 1fr;
    }
}