/* SVG Icon System */
.icon {
    display: inline-block;
    vertical-align: middle;
    fill: currentColor;
    flex-shrink: 0;
}

/* Standard sizes */
.icon--small {
    width: 16px;
    height: 16px;
}

.icon--medium {
    width: 20px;
    height: 20px;
}

.icon--large {
    width: 24px;
    height: 24px;
}

/* Icon spacing helpers */
.icon--spaced {
    margin-right: 8px;
}

.icon--spaced-left {
    margin-left: 8px;
}

/* Icon alignment helpers */
.icon--top {
    vertical-align: top;
}

.icon--middle {
    vertical-align: middle;
}

.icon--bottom {
    vertical-align: bottom;
}

/* ==================== SVG ICON DEFINITIONS ==================== */
/* These icons replace emoji usage for professional, consistent rendering */

/* Lock Icon - Replaces 🔐 */
.icon-lock {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='3' y='11' width='18' height='11' rx='2' ry='2'%3E%3C/rect%3E%3Cpath d='M7 11V7a5 5 0 0 1 10 0v4'%3E%3C/path%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* Graduation Cap Icon - Replaces 🎓 */
.icon-graduation {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M22 10v6M2 10l10-5 10 5-10 5z'%3E%3C/path%3E%3Cpath d='M6 12v5c3 3 9 3 12 0v-5'%3E%3C/path%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* Search Icon - Replaces 🔍 */
.icon-search {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='8'%3E%3C/circle%3E%3Cpath d='m21 21-4.35-4.35'%3E%3C/path%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* Globe Icon - Replaces 🌍 */
.icon-globe {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'%3E%3C/circle%3E%3Cline x1='2' y1='12' x2='22' y2='12'%3E%3C/line%3E%3Cpath d='M12 2a15.3 15.3 0 0 1 4 10 15.3 15.3 0 0 1-4 10 15.3 15.3 0 0 1-4-10 15.3 15.3 0 0 1 4-10z'%3E%3C/path%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* Chart/Bar Graph Icon - Replaces 📊 */
.icon-chart {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cline x1='18' y1='20' x2='18' y2='10'%3E%3C/line%3E%3Cline x1='12' y1='20' x2='12' y2='4'%3E%3C/line%3E%3Cline x1='6' y1='20' x2='6' y2='14'%3E%3C/line%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* Trophy Icon - Replaces 🏆 */
.icon-trophy {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9H4.5a2.5 2.5 0 0 1 0-5H6'%3E%3C/path%3E%3Cpath d='M18 9h1.5a2.5 2.5 0 0 0 0-5H18'%3E%3C/path%3E%3Cpath d='M4 22h16'%3E%3C/path%3E%3Cpath d='M10 14.66V17c0 .55-.47.98-.97 1.21C7.85 18.75 7 20.24 7 22'%3E%3C/path%3E%3Cpath d='M14 14.66V17c0 .55.47.98.97 1.21C16.15 18.75 17 20.24 17 22'%3E%3C/path%3E%3Cpath d='M18 2H6v7a6 6 0 0 0 12 0V2Z'%3E%3C/path%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* Sparkle/Star Icon - Replaces ✨ */
.icon-sparkle {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 3v18M3 12h18M5.6 5.6l12.8 12.8M18.4 5.6L5.6 18.4'%3E%3C/path%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* ==================== ALERT/WARNING ICONS ==================== */
/* Used by InvoiceHelper.GetOverdueWarning() for payment status indicators */

/* Alert Octagon - Critical (Replaces urgent warnings) */
.icon-alert-octagon {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolygon points='7.86 2 16.14 2 22 7.86 22 16.14 16.14 22 7.86 22 2 16.14 2 7.86 7.86 2'%3E%3C/polygon%3E%3Cline x1='12' y1='8' x2='12' y2='12'%3E%3C/line%3E%3Cline x1='12' y1='16' x2='12.01' y2='16'%3E%3C/line%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* Alert Triangle - Warning (Replaces overdue warnings) */
.icon-alert-triangle {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m21.73 18-8-14a2 2 0 0 0-3.48 0l-8 14A2 2 0 0 0 4 21h16a2 2 0 0 0 1.73-3Z'%3E%3C/path%3E%3Cline x1='12' y1='9' x2='12' y2='13'%3E%3C/line%3E%3Cline x1='12' y1='17' x2='12.01' y2='17'%3E%3C/line%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* Alert Circle - Info (Replaces reminder alerts) */
.icon-alert-circle {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'%3E%3C/circle%3E%3Cline x1='12' y1='8' x2='12' y2='12'%3E%3C/line%3E%3Cline x1='12' y1='16' x2='12.01' y2='16'%3E%3C/line%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* Clock - Payment Due Soon */
.icon-clock {
    display: inline-block;
    width: 1em;
    height: 1em;
    vertical-align: middle;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='12' cy='12' r='10'%3E%3C/circle%3E%3Cpolyline points='12 6 12 12 16 14'%3E%3C/polyline%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

/* Icon color variants */
.icon-primary {
    color: var(--accent-primary);
}

.icon-secondary {
    color: var(--accent-secondary);
}

.icon-success {
    color: var(--success-color);
}

.icon-warning {
    color: var(--warning-color);
}

.icon-danger {
    color: var(--danger-color);
}

/* Icon with text helper */
.icon-with-text {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* Animated icon hover effects */
.icon-hover-spin:hover {
    animation: spin 0.6s ease-in-out;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}